Malicious PDF — malware analysis report

Static analysis result for SHA-256 68dcce1ac2f3491c…

MALICIOUS

PDF

42.0 KB Created: 2020-08-24 13:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd4d97ab84ab212a2239f7d87dcefd57 SHA-1: bb860d8d04cb299fd618f75129ed6a4162fe5447 SHA-256: 68dcce1ac2f3491c75a6b6b987799745173caa031cc5276658cca6f927dccd4f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to distribute further malicious content or lead to phishing pages. The document body, though heavily obfuscated, contains the same URL and references sheet music, suggesting a lure. The ML classifier also strongly indicated maliciousness.

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=poptropica+flute+sheet+music
    • http://files.eygbball.com/uploads/1/3/0/7/130738859/e4297afe7f04a0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/imf_financial_stability_report_oct_2019.pdf
    • https://cdn.shopify.com/s/files/1/0446/5275/7155/files/taiwan_passport_renewal_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6485/files/8609922488.pdf
    • https://cdn.shopify.com/s/files/1/0428/2331/9715/files/gilozebekifalijogafupeso.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0726/files/sannce_cctv_footage.pdf
    • https://cdn.shopify.com/s/files/1/0439/7488/5534/files/zupawopusulomur.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/jifozojatikonasorinumipo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3631/0678/files/degetoninokadefoleri.pdf
    • https://cdn.shopify.com/s/files/1/0437/8876/3298/files/al_kahf_quran.pdf
    • https://cdn.shopify.com/s/files/1/0431/9939/8052/files/36318933245.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3303/files/adobe_photoshop_alternative_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/73001287042.pdf
    • https://cdn.shopify.com/s/files/1/0435/1796/8543/files/modding_stardew_valley.pdf
    • https://cdn.shopify.com/s/files/1/0432/5005/7373/files/49970767507.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_off00006779.bin
47bbfc608cc440ba95b24fefe5f015f0e30c8495f6049ffb7f2d1e164cde0e10
pdf-font-stream PDF embedded font (sfnt) at offset 0x6779 5256 bytes
font_01_sfnt_off00007929.bin
9ab2479aa467782c273853c6c970fcd81c7e6f760cb9c1c2ed3a692e11afa2ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x7929 10088 bytes