Malicious PDF — malware analysis report

Static analysis result for SHA-256 780f0de33a70f6a3…

MALICIOUS

PDF

44.7 KB Created: 2020-08-20 09:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e46022629c78c5a300f8211b487194e SHA-1: 8087cb7fe4f85e28d2b411845922241dcca5e5e0 SHA-256: 780f0de33a70f6a3916874d23252810215144ac3b8073797582a6f506a79e190
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure related to donation receipts and embeds a large number of external links, many of which point to PDF files. One of these links, https://ttraff.ru/pify?keyword=donation+receipt+word+template, is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document's structure and embedded links suggest it is part of a link farm or SEO manipulation scheme designed to lead users to malicious infrastructure.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.ru/pify?keyword=donation+receipt+word+template
    • http://files.thornhillactingstudio.com/uploads/1/3/0/7/130775528/papagubela.pdf
    • http://files.unityminorhockey.com/uploads/1/3/0/7/130776573/4083109.pdf
    • http://files.houseofhopenh.org/uploads/1/3/0/8/130814534/japaxenopopepi.pdf
    • http://juzafelax.djbowmanracing.com/uploads/1/3/0/8/130874075/4727920.pdf
    • http://files.friendsoftheanimalsjackson.org/uploads/1/3/1/4/131411539/1838371.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/3149/4810/files/3100921490.pdf
    • https://cdn.shopify.com/s/files/1/0436/1873/0147/files/vorejavogamiwotetuja.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/1123290225.pdf
    • https://cdn.shopify.com/s/files/1/0437/3997/1738/files/update_android_box.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/ampere_hour_capacity_of_battery_and_battery_backup_calculation.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/rufifubuzelakitew.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/62404873047.pdf
    • https://cdn.shopify.com/s/files/1/0431/8930/5501/files/capnography_waveform_interpretation.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/79487425228.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/31251468375.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000632f.bin
a5283a36c6b92d1aac5a0fb68f1646b0275a152d9a7c0e65bfcb3836766f79f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632F 4920 bytes
font_01_sfnt_off000073dc.bin
0a57d1bd643955b50a6b791e80f6a56846eadc578f36910023dc3816238e04fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DC 10500 bytes
font_02_sfnt_off000097a1.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97A1 4324 bytes

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