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)
MD5: a5df6430bce941bb33c5afc5c2b49410 SHA-1: 13fb2bbb9d8f628e0626e57b23bfdfe1c82b46c3 SHA-256: 9be732540ac594aefeb4486875054652ff4ae9ef92c69106da161690a677b035
150 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 3

  • 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.
  • 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
    • http://files.gailynbopp.net/uploads/1/3/2/3/132303163/5724714.pdf
    • http://files.stephaniehendersondesigns.com/uploads/1/3/2/7/132740277/543027.pdf
    • http://kidajeg.cryptofleamarket.co/uploads/1/3/1/6/131637136/5479701.pdf
    • http://files.pro-mx.com/uploads/1/3/0/9/130969080/tivaxe_wokuv_fatoropenaxipu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9284/4448/files/37682450985.pdf
    • https://cdn.shopify.com/s/files/1/0437/5917/3790/files/90037643093.pdf
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/54486599038.pdf
    • https://cdn.shopify.com/s/files/1/0434/4722/2422/files/20131852196.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/86842167964.pdf
    • https://cdn.shopify.com/s/files/1/0434/4247/1064/files/gofetilatis.pdf
    • https://cdn.shopify.com/s/files/1/0452/3737/1037/files/addison_disease_early_detection_and_treatment_principles.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/46963528990.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/50039404948.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/43418843264.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9605/files/votitotelovufefodebakufim.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 5

Files carved from inside the sample during analysis.

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

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