Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e60ab2c4f25d18b…

MALICIOUS

PDF

78.0 KB Created: 2020-07-31 02:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee2e3ce3833ab808fcd319fd7e556daf SHA-1: 0a857b54948b6f8033705c7130704a65b41bce8f SHA-256: 6e60ab2c4f25d18b384479e3fe30e625f04862a31d858f130bca97b40625f262
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of numerous links suggests an attempt to redirect users to potentially harmful sites, 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=desenho+de+caldeiraria+pdf
    • http://files.rareavis.net/uploads/1/3/1/8/131856627/7c2cf8f95958ed3.pdf
    • http://files.undergraduatebusinesscouncil.com/uploads/1/3/1/6/131606006/sosamasegan-fulupudiz-ladesodibatim-dipuxapafo.pdf
    • http://files.stambrosefostercity.org/uploads/1/3/1/3/131381414/9636878.pdf
    • http://files.junglingworks.com/uploads/1/3/1/3/131379820/lovigarasel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/95224884831.pdf
    • https://cdn.shopify.com/s/files/1/0434/3188/6998/files/nofikefekagawigolakix.pdf
    • https://cdn.shopify.com/s/files/1/0435/1872/2216/files/firowibaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/tomubimu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/2487051359.pdf
    • https://cdn.shopify.com/s/files/1/0438/0036/3169/files/22375669507.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/61999556924.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/44546932881.pdf
    • https://cdn.shopify.com/s/files/1/0429/2473/6678/files/10534064014.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/87565240287.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/pekivupa.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_off0000f087.bin
0c416ed3bb365ca19cf0e4906d0aad17b045cfd26cb0a2bfd2ed66c855a4fb71
pdf-font-stream PDF embedded font (sfnt) at offset 0xF087 4952 bytes
font_01_sfnt_off0001013e.bin
0d5c8d8c9c7ea38380bc634784f220ec15e5ff0da4e2057747b1399616c45f87
pdf-font-stream PDF embedded font (sfnt) at offset 0x1013E 13772 bytes