Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00b82ae5e4d0952…

MALICIOUS

PDF

50.5 KB Created: 2020-08-08 07:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d369cc53b59c690110316da4a4363dac SHA-1: 01a8c615b2d15eac690c8cd434565fe8232e8ecc SHA-256: a00b82ae5e4d0952f402332ccac4887b98701c84bc579d39f5f1d9de2512205d
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic firing for a malicious redirector link. The document body and embedded URLs indicate a likely SEO poisoning or link farm tactic, where numerous links are provided to potentially malicious or deceptive content. The primary redirector URL is https://ttraff.cc/pify?keyword=the+painter+of+modern+life+baudelaire+pdf, which likely leads to further malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=the+painter+of+modern+life+baudelaire+pdf
    • http://files.milescustomracing.com/uploads/1/3/1/4/131483361/870971.pdf
    • http://files.mpsecoalition.org/uploads/1/3/1/4/131437775/8253398.pdf
    • http://kudopole.neighbourhoodnoms.com/uploads/1/3/1/3/131383791/befemedivivolof.pdf
    • http://koziret.gertrudefashions.com/uploads/1/3/1/1/131164312/lutuf.pdf
    • http://files.stocktonjunk.com/uploads/1/3/0/7/130739120/225092892ee6339.pdf
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/29115801926.pdf
    • https://cdn.shopify.com/s/files/1/0430/1658/5379/files/vujotumujenedira.pdf
    • https://cdn.shopify.com/s/files/1/0433/2165/5464/files/68826008313.pdf
    • https://cdn.shopify.com/s/files/1/0434/9798/0056/files/zugijegatiwarokusewiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/228990692.pdf
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/oxford_bookworms_library_stage_6_oliver_twist.pdf
    • https://cdn.shopify.com/s/files/1/0433/7755/7660/files/ooh_child_chords.pdf
    • https://cdn.shopify.com/s/files/1/0432/6716/2276/files/17952417811.pdf
    • https://cdn.shopify.com/s/files/1/0432/5680/7586/files/32326085464.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/bobcat_753_specs.pdf
    • https://cdn.shopify.com/s/files/1/0437/0271/4533/files/80220230275.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000895e.bin
2d034ea27390445f6a9f76509f99017d7ebefb87a1a461a57fbb3d7333221481
pdf-font-stream PDF embedded font (sfnt) at offset 0x895E 5192 bytes
font_01_sfnt_off00009ad2.bin
e3454e32a93ab8418403103dbe7a653fc71ed20694741b4e78bfcebcf74ca1df
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD2 9972 bytes