Malicious PDF — malware analysis report

Static analysis result for SHA-256 7071b0845bc0f80f…

MALICIOUS

PDF

44.9 KB Created: 2020-08-18 20:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52d0dca7f31d247cfe3ee4501aad6e90 SHA-1: c710596a4ec74ab44c357cf6ccd64c114e0718aa SHA-256: 7071b0845bc0f80f58b26a3cdd90d5aca88133801304bfa075b87bbed9c51fcf
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary redirector URL being https://ttraff.com/pify?keyword=pdf+link+open+new+browser+window. This suggests a phishing or malware distribution campaign. The heuristic 'SE_LOLBIN_RUN_COMMAND' also indicates potential execution of commands, possibly related to downloading further payloads from the linked Shopify URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=pdf+link+open+new+browser+window
    • http://zepuf.gracekingdombeauty.com/uploads/1/3/0/8/130874631/2077410.pdf
    • http://somexivot.davaocityproperties.com/uploads/1/3/1/6/131636725/41e3b60c2e46.pdf
    • http://files.kingtonfoodfestival.co.uk/uploads/1/3/1/3/131381450/rogapudujudupijewu.pdf
    • http://files.lindseyleemiska.com/uploads/1/3/0/7/130738779/resokurizaxusafi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/95769012521.pdf
    • https://cdn.shopify.com/s/files/1/0437/7647/5290/files/powershell_download_file.pdf
    • https://cdn.shopify.com/s/files/1/0432/7017/6928/files/tobewitupazivurukos.pdf
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/34861407780.pdf
    • https://cdn.shopify.com/s/files/1/0434/9214/7352/files/1719051570.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0862/files/yw_text_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0433/1605/2126/files/bangladeshi_movie_mon_mane_na.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/sowosajazubalubekizo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/pursuit_of_holiness_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/lotupe.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/
    • https://cdn.shopify.com/s/files
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006460.bin
f659fe1e220056b1a335393db209be10a61ef8f50f664383e6ffc76499d6ee4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6460 4832 bytes
font_01_sfnt_off000074d4.bin
4b9c14a934bbfb726c9821450797b1f7fdd78f9fa67a9af5c43558d97bad51c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D4 10420 bytes
font_02_sfnt_off00009884.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9884 4324 bytes

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