Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a825c39a28e40d…

MALICIOUS

PDF

43.0 KB Created: 2020-07-25 05:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cf421c4011f69a15c701e67cf36e61e SHA-1: 441b96fa0124740aaee2bef3a131c93228fe033d SHA-256: 80a825c39a28e40dd638693196113c82121a5d5e4a50a11d988a064b4fcc0baf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.com/pify?keyword=asphalt+8+airborne++google+play', is flagged as a malicious redirector. This suggests the document's primary purpose is to direct users to potentially harmful websites, possibly for phishing or malware distribution.

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=asphalt+8+airborne++google+play
    • http://files.joraczewski.com/uploads/1/3/2/6/132695428/1063148.pdf
    • http://files.deckermusicstudio.com/uploads/1/3/2/8/132814906/fb7e7038aa15.pdf
    • http://files.carsfordummies.org/uploads/1/3/0/9/130969446/7081717.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/luxanozifitopad.pdf
    • https://cdn.shopify.com/s/files/1/0440/4350/1733/files/42294375894.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/73986010472.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/suwuvilegovuso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14490041284.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/kavib.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/rokemupe.pdf
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/zepubobibujunenesotop.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/44806363586.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/solabupojazebexawo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4143/8366/files/39408869726.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/74068138123.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_off00006822.bin
eefbea7c57c89559b119c458e5eb1326671dd9e8965aaeb64c7de825ffdeaa8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6822 5296 bytes
font_01_sfnt_off00007a0d.bin
fa902771457466736c4d506a7d2b00f9a09ef301feba23661a01b475dd4f69bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0D 10732 bytes