Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e761cd067279759…

MALICIOUS

PDF

47.7 KB Created: 2020-08-23 05:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 496899691a9ce309c208efecc0687621 SHA-1: 278b15b3bda0b69eacfe503ecdcc5a47552adcb5 SHA-256: 5e761cd067279759ec958b6a55e88b5fbbd54cd56e9f2381a2c3544f2b98dc57
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with the primary URL `https://ttraff.cc/pify?keyword=harvest+moon+gba+guide+pdf` identified as a malicious redirector. The document's structure suggests it's part of a link farm designed to drive traffic to potentially malicious sites. The ML classifier also strongly indicated maliciousness.

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=harvest+moon+gba+guide+pdf
    • http://files.psms95x.org/uploads/1/3/0/7/130776739/lazogove-sedezedexamo.pdf
    • http://files.sciencebrewer.org/uploads/1/3/1/8/131857120/6105408.pdf
    • http://gapeteda.charityleaguelexington.com/uploads/1/3/1/0/131069899/pasubopok-pufikip-dutubarom-dotiketepopi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/44949953364.pdf
    • https://cdn.shopify.com/s/files/1/0435/6702/2239/files/57701360521.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/wujawatonomibu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7749/2118/files/khan_academy_computer_programming_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/8555/4073/files/jizopatopin.pdf
    • https://cdn.shopify.com/s/files/1/0432/6001/8852/files/patuso.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/lezelafuxebadipamumeba.pdf
    • https://cdn.shopify.com/s/files/1/0429/6844/9180/files/95401460950.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/1296357170.pdf
    • https://cdn.shopify.com/s/files/1/0432/5444/8286/files/sefixavefokin.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_off00007ce2.bin
7e3231d6beda4b0baff37e653354ea3de836241b14774bc8e0eb5709580a4df1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE2 5492 bytes
font_01_sfnt_off00008f74.bin
57dd78b38508438b06d1faf4e354bc61ad493b7cf67ff15e0bf207b0341618cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F74 10100 bytes