Malicious PDF — malware analysis report

Static analysis result for SHA-256 54758517adf6bac3…

MALICIOUS

PDF

40.5 KB Created: 2020-08-14 00:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1714bdf318b2dd8e937945fe04bf235b SHA-1: 4ac2dc413ecbdd5b20e117de43dd95baf9698bd5 SHA-256: 54758517adf6bac32ed83a019f191c5c60fbfad4eb6e1ff1bc0bc782fef96103
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at ttraff.com. This suggests a link farm or SEO poisoning tactic to lure victims. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded malicious URL is the primary indicator of compromise.

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.com/pify?keyword=angle+relationships+worksheet%2523+2+answer+key+pdf
    • http://files.boxnats.com/uploads/1/3/2/6/132695339/xivixufu.pdf
    • http://files.colinjlmccartney.com/uploads/1/3/1/1/131164159/popeponuraju-perufukiraf-lipakinubosop.pdf
    • http://files.wellsaiddave.com/uploads/1/3/0/7/130775851/e15edde09342.pdf
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/sategabulowomalirebik.pdf
    • https://cdn.shopify.com/s/files/1/0454/6953/2310/files/alfred_rosenberg_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/0877/0726/files/82288600541.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/45569237984.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/kixizumosex.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/mafigejewitametu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/83655346970.pdf
    • https://cdn.shopify.com/s/files/1/0435/6636/6869/files/asus_router_reset.pdf
    • https://cdn.shopify.com/s/files/1/0438/4122/4861/files/aviva_plc_annual_report_and_accounts_2016.pdf
    • https://cdn.shopify.com/s/files/1/0428/6752/3743/files/preeclampsia_y_eclampsia_figo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/ziwozaperarap.pdf
    • https://cdn.shopify.com/s/files/1/0439/0692/4712/files/amsterdam_plano_turistico.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_off00005ff0.bin
0e79b360f2fe5bd6431810108c4c70006eaed48748c7710952e80889badd554c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF0 5224 bytes
font_01_sfnt_off000071c5.bin
fc582090b669c0fbbfd22fd8c258c78fc7e3a65d3c995633cd217b82e801d42a
pdf-font-stream PDF embedded font (sfnt) at offset 0x71C5 10420 bytes