Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38d218c19209ba3…

MALICIOUS

PDF

52.0 KB Created: 2020-07-26 01:35:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 302934d149cd7ec25ff9a62afdf365fd SHA-1: 765980e82d93bd018ae2f075377297e607b99d02 SHA-256: a38d218c19209ba3605929e88fe8fccedff0c12fa9aa7b09944ca56784dc570d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in conjunction with a lure for 'driver booster full crack windows 10'. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through a fake software crack download lure, directing users to malicious infrastructure.

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=driver+booster+full+crack+windows+10
    • http://files.idyllicliving.com/uploads/1/3/0/8/130873855/mexurarogosu.pdf
    • http://files.negrojusticeleague.com/uploads/1/3/1/4/131407698/padub-farep.pdf
    • http://files.406cavoodle.com/uploads/1/3/2/8/132815807/jetopemesobuteb_zelavobomen_fexawat_kizizuni.pdf
    • http://files.melissaairy.com/uploads/1/3/0/7/130775245/dipovoxujuzif-kabemugaloj.pdf
    • http://files.amyryan.net/uploads/1/3/1/4/131406510/b71770beb8a.pdf
    • http://files.406cavoodle.com/uploads/1/3/2/8/1328158
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/bobazaleparotosi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0067/7031/files/42099913115.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/lozatagijoviselaja.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/69335494890.pdf
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/zevivigojafedanowipufe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kilezolesosobusafo.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6861/files/15283588352.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/zanuzazomevutif.pdf
    • https://cdn.shopify.com/s/files/1/0438/5744/5029/files/duwojav.pdf
    • https://cdn.shopify.com/s/files/1/0434/3499/9975/files/57549954220.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5286/files/xedurew.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/xivir.pdf
    • https://cdn.shopify.com/s/files/1/0430/5285/9543/files/xufekakuxidoxowelo.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008cef.bin
c1e3fc2e0ba2bfae48b73d7660e88961adf2afa6d1adf889368f6b3241ea03f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CEF 5448 bytes
font_01_sfnt_off00009fa0.bin
4b0b9dd724b16fec7044cfeecf50123091d7a925279624aea66d12534cd66cae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FA0 10328 bytes

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