Malicious PDF — malware analysis report

Static analysis result for SHA-256 89484fe82134d7fc…

MALICIOUS

PDF

41.4 KB Created: 2020-08-19 18:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f2411568d448780ea44e3856c083964 SHA-1: 40a9ec4d88f07ec31c33bed98fc0beda36b1e528 SHA-256: 89484fe82134d7fc66f6a1f18afa4c032faee442321df38f78d224f6bcffbeab
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains a large number of embedded links. One of these links, https://ttraff.cc/pify?keyword=impartial+reporter+newspaper+enniskillen+northern+ireland, points to a known malicious redirector. The document appears to be a link farm, with many URLs pointing to PDF files hosted on cdn.shopify.com and other domains, likely serving as a lure to distribute malicious content or conduct phishing attacks.

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=impartial+reporter+newspaper+enniskillen+northern+ireland
    • http://files.aprilhoy.com/uploads/1/3/2/6/132681579/kepusetu.pdf
    • http://pikab.kunstzinnigelusters.com/uploads/1/3/0/7/130738993/goxasonala.pdf
    • http://gipemapon.howlingmadhotsaucecollc.com/uploads/1/3/1/4/131453133/383259.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/prvi_balkanski_rat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5548/files/55336280769.pdf
    • https://cdn.shopify.com/s/files/1/0433/9535/0684/files/19596264281.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/46421444440.pdf
    • https://cdn.shopify.com/s/files/1/0431/4179/1895/files/tenasimuwifolawovefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4031/7350/files/signs_and_symptoms_of_alzheimer_disease.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/2998/files/16119632655.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/dafuziwezogowa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0675/4970/files/79697006884.pdf
    • https://cdn.shopify.com/s/files/1/0443/0639/9388/files/assignment_problem_in_operational_research.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_off0000644d.bin
31197e7a5030742ed2afd1d25ee9956df98c5666094f241d083d718824a245de
pdf-font-stream PDF embedded font (sfnt) at offset 0x644D 5292 bytes
font_01_sfnt_off00007620.bin
dbe239fec7258dfad8ba5e392023ea8b577c3739a43f46017b555ddc980d4dab
pdf-font-stream PDF embedded font (sfnt) at offset 0x7620 10076 bytes