Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25a1bd072cfb7b6…

MALICIOUS

PDF

40.1 KB Created: 2020-08-27 18:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdffd42015364b7900005389aecf48d0 SHA-1: 4cc4564103a6271ddef96c79d3d220aa61888188 SHA-256: d25a1bd072cfb7b6326953286120b2f7384415f21ef76c5d0ce8eb5fedf31b2c
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=manual+de+flash+basico'. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a lure to external content. The heuristic 'SE_URGENCY_LURE' further supports the idea that the document is designed to trick the user into clicking the malicious link.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=manual+de+flash+basico
    • http://files.kennickbuilders.com/uploads/1/3/2/6/132682204/2495581.pdf
    • http://doxarine.littlevipschildcare.net/uploads/1/3/0/7/130776054/vejomubezame_fojavewoj_dovebe.pdf
    • http://noxajere.flashforge.com.hk/uploads/1/3/1/0/131070374/kajojuzaga-mavejapakuzup-zutatukufog.pdf
    • http://files.thomas-flores.com/uploads/1/3/1/4/131437660/8265386.pdf
    • http://files.gammanusigmasgrho.org/uploads/1/3/1/3/131384495/fajebupiz-gobiz-womixagupobaba.pdf
    • https://cdn.shopify.com/s/files/1/0456/4264/5671/files/12980156708.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3534/files/90786537258.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8574/files/zabepog.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9165/files/readings_in_ancient_greek_philosophy_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/7576/3353/files/7706606518.pdf
    • https://cdn.shopify.com/s/files/1/0431/4343/0305/files/sufaxokafiwunaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2980/6759/files/jepamuli.pdf
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/company_portfolio.pdf
    • https://cdn.shopify.com/s/files/1/0432/0890/0768/files/21542202881.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6473/files/fallout_4_weapons_on_back.pdf
    • https://cdn.shopify.com/s/files/1/0457/7152/2214/files/karuppusamy_kuthagaikarar_movie_hd.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/acog_guidelines_gestational_trophoblastic_disease.pdf
    • https://cdn.shopify.com/s/files/1/0437/9816/7713/files/ejercicios_tabla_numero_atomico_y_ma.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_off00005eb7.bin
d02a4b6ff8139e53371e95a2f281e9a39cf981a896f74e2aaf2c69d36b1e67b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB7 5160 bytes
font_01_sfnt_off00007037.bin
e4136653c2ca0f87fcf3425147fe889fb26f194b782507880fc15f784c95aed9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7037 10376 bytes