Malicious PDF — malware analysis report

Static analysis result for SHA-256 073fd45e37156ab7…

MALICIOUS

PDF

45.1 KB Created: 2020-08-23 15:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 932db11f275792b89a19983b9ad2e563 SHA-1: 42ff44213bd86edb8fb9ae76f9236c467da3c97c SHA-256: 073fd45e37156ab78040127d7a766784df48f712ddafb486dec323c2f477acdd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with the primary link directing to a known malicious redirector. The document body also contains a URL that appears to be a lure for pirated content. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the presence of malicious redirector links and a link farm.

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=ankush+1986+full+movie
    • http://files.springfieldvermontumc.com/uploads/1/3/1/0/131070035/1574741.pdf
    • http://files.followmytravel.net/uploads/1/3/1/4/131409009/3280763.pdf
    • http://files.tcnoodleshack.com/uploads/1/3/1/3/131384101/rizoletaliduki.pdf
    • http://dividitet.moonsiewshutters.com/uploads/1/3/0/7/130738524/9201166.pdf
    • http://fomuzo.fightnightblog.com/uploads/1/3/1/6/131606419/kalixuwe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0435/2878/1988/files/gregg_reference_manual_worksheets_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0454/5331/2150/files/84503857262.pdf
    • https://cdn.shopify.com/s/files/1/0435/4598/5192/files/fozelalevebesub.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/sexazogojode.pdf
    • https://cdn.shopify.com/s/files/1/0433/9384/3356/files/how_to_install_nvidia_drivers_ubuntu._run.pdf
    • https://cdn.shopify.com/s/files/1/0433/9721/8458/files/72528215658.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/82544080240.pdf
    • https://cdn.shopify.com/s/files/1/0434/5797/0328/files/gaxenazidumuwipamijubev.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/fisumadunoj.pdf
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/niradijepofezure.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7866/files/25358043737.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_off000061ee.bin
35ebfefab992940bb89373e035213373acfd612e0134ec59a419cff76b6dd519		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EE 5368 bytes
font_01_sfnt_off00007417.bin
af30dac84e9b21d919f50e3b8e09b64e476110e9ea6157fe4896726a939d2b75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7417 10172 bytes
font_02_sfnt_off00009727.bin
bef7734efad220e5af10f05f1cc0a8683b446aee279d29bffd12a990c2a02dc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9727 4344 bytes

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