Malicious PDF — malware analysis report

Static analysis result for SHA-256 680e97fca3c243fb…

MALICIOUS

PDF

38.2 KB Created: 2020-08-21 14:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 674469915f1c035e5f474601e0d60c40 SHA-1: fc130f45d601e38cd818f76187d92ca092f0bf6a SHA-256: 680e97fca3c243fbc86b681a08e13164dbdaee514b7026b746d096603fb91b9c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and a list of other URLs hosted on Shopify and other domains, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to malicious sites, likely for phishing or malware delivery.

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.cc/pify?keyword=apc+back+ups+600+manual
    • http://files.newportnewslinks.org/uploads/1/3/1/4/131407233/65b10e879fb321.pdf
    • http://files.talesfromparadiseheights.com/uploads/1/3/0/7/130740342/754108.pdf
    • http://lazapu.soultonica.com/uploads/1/3/1/4/131452883/lisimuxoruj-gazupupajobadub-tejatusobi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/49198142786.pdf
    • https://cdn.shopify.com/s/files/1/0437/1048/0533/files/97075194085.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/mass_effect_2_zaeed_dlc_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/4480/5525/files/jowidafimukefola.pdf
    • https://cdn.shopify.com/s/files/1/0440/8875/4328/files/6140556664.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/jadesamap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/crystal_auto_typer_form_filling_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/pip_install_box2d.pdf
    • https://cdn.shopify.com/s/files/1/0428/4379/9719/files/characteristics_of_computer_graphics.pdf
    • https://cdn.shopify.com/s/files/1/0439/0184/5659/files/differential_calculus_by_das_and_mukherjee.pdf
    • https://cdn.shopify.com/s/files/1/0437/2794/5889/files/facebook_chat_heads.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/jijenevixeki.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b4d.bin
8a51a27df2d3e46b1806e59194436ae5e553a81ff3c280c130e248864cd56c67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B4D 4996 bytes
font_01_sfnt_off00005c1d.bin
0c6c08777af9f31faedd7d61b239cb56d4b2906eda800045c2d8553d2cd972f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1D 9888 bytes
font_02_sfnt_off00007df5.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF5 4324 bytes

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