Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be732540ac594ae…

MALICIOUS

PDF

57.8 KB Created: 2020-08-08 03:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a5df6430bce941bb33c5afc5c2b49410 SHA-1: 13fb2bbb9d8f628e0626e57b23bfdfe1c82b46c3 SHA-256: 9be732540ac594aefeb4486875054652ff4ae9ef92c69106da161690a677b035
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high density of external links, many pointing to a redirector service (ttraff.cc). The document body, though heavily obfuscated, contains the URL that leads to the redirector, which is disguised as 'mental math worksheets grade 7 pdf'. This suggests a social engineering tactic to drive traffic to malicious infrastructure. No scripts were extracted, and the primary malicious behavior is the redirection to a known malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=mental+math+worksheets+grade+7+pdf In PDF document text
    • http://files.gailynbopp.net/uploads/1/3/2/3/132303163/5724714.pdfIn PDF document text
    • http://files.stephaniehendersondesigns.com/uploads/1/3/2/7/132740277/543027.pdfIn PDF document text
    • http://kidajeg.cryptofleamarket.co/uploads/1/3/1/6/131637136/5479701.pdfIn PDF document text
    • http://files.pro-mx.com/uploads/1/3/0/9/130969080/tivaxe_wokuv_fatoropenaxipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9284/4448/files/37682450985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5917/3790/files/90037643093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/54486599038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4722/2422/files/20131852196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/86842167964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4247/1064/files/gofetilatis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/3737/1037/files/addison_disease_early_detection_and_treatment_principles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/46963528990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/50039404948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/43418843264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6753/9605/files/votitotelovufefodebakufim.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A4 5696 bytes
SHA-256: 677b4002258b0c1c265df9d8f9df2df826d2f20e15f75bcd803095bf1750caab
font_01_sfnt_off00008a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A09 3204 bytes
SHA-256: 55635b50bad29c6b04cd9b4d5dd064b78be6c29eafc981c666da6fe4470a6799
font_02_sfnt_off000096f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96F9 2320 bytes
SHA-256: 7bb91423d63eb6bd7c2657278979848d60b7d38679106ec23dbd755ba6ab3d32
font_03_sfnt_off0000a149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA149 10100 bytes
SHA-256: 81c793eed312775e7ebe2ae90882ff5d119163fd42bc318dda11cebdbf7150b4
font_04_sfnt_off0000c3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D5 16224 bytes
SHA-256: 4362e686776cae9b5e877a8e5de4a1ff5ae9966626bcf1046762b8e3a01bbea2