Malicious PDF — malware analysis report

Static analysis result for SHA-256 b429fdef7d2de84c…

MALICIOUS

PDF

47.9 KB Created: 2020-08-05 09:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3bc8fa01447d6c8420df8e955f8f0236 SHA-1: 8486e00370db2f7c602b53b1cb5acfcffc3432ff SHA-256: b429fdef7d2de84ccdb8ebede8f3d3268c7cda2d2ca52008b0a4d93d550b374e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=accounting+principles+exercises+pdf', is likely intended to redirect the user to a malicious site. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm for SEO poisoning or to obscure the final malicious destination. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence of malicious intent.

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=accounting+principles+exercises+pdf In PDF document text
    • http://dewawed.tiffanyfostersmith.com/uploads/1/3/2/8/132815367/kedewupix.pdfIn PDF document text
    • http://files.emmanuellaflamme.com/uploads/1/3/1/0/131070718/dadisizujiwulupeka.pdfIn PDF document text
    • http://files.thesolbus.com/uploads/1/3/1/1/131164100/18169ed1ac74dd0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7294/5304/files/jawidokaruniwome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1311/9905/files/89760170100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/cambridge_igcse_maths_core_and_extended_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4505/9749/files/lufetejixiwupup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/23779293113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1409/5001/files/free_converter_to_word_for_windows_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/66875483776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kijajakunij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3414/0072/files/12074210718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6567/9776/files/beelzebub_manga_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0510/0711/files/60012777728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/torujibexawegidekazefemeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/typescript_array_of_objects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6930/8061/files/34603042950.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000665d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665D 5168 bytes
SHA-256: 26150fd7f61041ec66c0625966c2da8e59b1e77aa73c8e759dd0e78981dc1a3c
font_01_sfnt_off00007811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7811 10836 bytes
SHA-256: bebca24aff71d5867ae2a94dca12734d9930e1c7eaa2d29abb919d2bcd7c6944
font_02_sfnt_off00009d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D4E 16084 bytes
SHA-256: 8eda1f23b43e68bd053b6b1429c45debde68943dc86580dafe97bb33ffd1ae66