Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b18488777570626…

MALICIOUS

PDF

83.1 KB Created: 2020-08-31 02:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89086a9522058b037445e4bf835a9cda SHA-1: f2fa193c23f8fe982bf11a852e4323612d4ee106 SHA-256: 0b184887775706264fd042c67d168f465329d0c6b1fb75bf73ea913089595ad8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector URL (ttraff.com). The document body, though heavily obfuscated, contains the same redirector URL. The presence of many external PDF links suggests a link farm or SEO spamming attempt, which often serves as a lure for malicious content.

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/wix?keyword=linea+del+tiempo+preclasico+clasico+y+posclasico
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6846/5053/files/zetigogutogovawiga.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/92168722321.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4243/files/29216307533.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/36116041750.pdf
    • https://cdn.shopify.com/s/files/1/0427/9900/5863/files/molecular_cloning_a_laboratory_manual.pdf
    • https://static.usrfiles.com/ugd/6a7407_2d552bbdd57e4aa4aaf9cae19ed0b282.pdf
    • https://static.usrfiles.com/ugd/ba3095_8c690107808d42b5948576c464bac84d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae865658a48742c28b8f1544b0c5d915.pdf
    • https://static.usrfiles.com/ugd/b8c837_1dcce9e24629473e9e374a9c32e7160e.pdf
    • https://static.usrfiles.com/ugd/9ea91e_29a4ec258c8e444abcca13eed460e408.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4946/files/mowusezusuvetimexamazoxuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/83027894940.pdf
    • https://cdn.shopify.com/s/files/1/0436/7450/1273/files/west_ham_vs_newcastle_match_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/100_basic_c_programs.pdf
    • https://cdn.shopify.com/s/files/1/0435/7524/7009/files/elite_dangerous_bounty_hunting_guide_2017.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001054b.bin
b2e74718986fed3036f64fa20e0a7d614845c03d0b9afd16968adeae22ae7453
pdf-font-stream PDF embedded font (sfnt) at offset 0x1054B 5260 bytes
font_01_sfnt_off00011718.bin
e01df53fd19e7f809ddee485798e812640bb3c51208f21d124e33b71a8694e17
pdf-font-stream PDF embedded font (sfnt) at offset 0x11718 11708 bytes