Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d2659a10e0a2cf…

MALICIOUS

PDF

45.0 KB Created: 2020-09-17 22:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f11c79044bf6d5536c7e60b956958d2 SHA-1: d2d1f5090f100636a964111e0e0755fe33fccc62 SHA-256: 59d2659a10e0a2cff0b4d9b18c7de5285b53ef2801be3677d49ee7f6f328536d
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a mass external PDF link farm. The document body contains the URL https://ttraff.club/wix?keyword=goober+peas+veep, which is a known malicious redirector. The file also contains numerous other links to PDF files hosted on various domains, suggesting a link farm designed to distribute malicious content or engage in SEO abuse for phishing purposes. No scripts were extracted, but the extensive link farm indicates a high likelihood of user redirection to malicious sites.

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.club/wix?keyword=goober+peas+veep
    • http://files.easysnacks.shop/uploads/1/3/2/8/132814071/ritutekaji.pdf
    • http://files.westburybondreferendum.org/uploads/1/3/0/7/130776208/nobixilamob_tanisil_pemodawovo.pdf
    • http://files.evmbespoke.com/uploads/1/3/1/4/131407459/minip.pdf
    • https://cdn.shopify.com/s/files/1/0437/6618/6135/files/51708192853.pdf
    • https://cdn.shopify.com/s/files/1/0456/4857/6679/files/badoo_live_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/sogajikijitebaxazuwowuxag.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/cyanogenmod_12._1_grouper.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/ancient_rome_culture.pdf
    • https://cdn.shopify.com/s/files/1/0433/9168/0673/files/adverbs_of_manner_esl_library.pdf
    • https://cdn.shopify.com/s/files/1/0463/3781/8786/files/94130795475.pdf
    • https://cdn.shopify.com/s/files/1/0443/6181/0076/files/barron_s_sat_subject_test_math.pdf
    • https://1574e0cf-fa6f-4c2b-a4e6-eb03c05b09e0.filesusr.com/ugd/19ce5d_f4e4fcf75dbd4cbaa214befa8dc4f4b2.pdf?index=true
    • https://7d10402e-b19a-48eb-8de3-a14d58615126.filesusr.com/ugd/0a052f_ce24ec36491d431d88f842faf905fea8.pdf?index=true
    • 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_off000071ff.bin
c9dd8f96e83bc075b138641071bb43733a88fc02d762c01ace552e72d0ac0e32
pdf-font-stream PDF embedded font (sfnt) at offset 0x71FF 5012 bytes
font_01_sfnt_off0000831d.bin
e9a8a170ac3b9439d747c63687f92b027f233903e2435df24822d0c3ba025925
pdf-font-stream PDF embedded font (sfnt) at offset 0x831D 10740 bytes