Malicious PDF — malware analysis report

Static analysis result for SHA-256 0306881e9923fa6d…

MALICIOUS

PDF

46.4 KB Created: 2020-08-20 13:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e3e1052dfd13eebb42c92591bab97f4 SHA-1: ac3c56c348d06c5023312ac01931b67acc2f635b SHA-256: 0306881e9923fa6de8d9cc1802dedffa583655057e9d76ad71d6ef0a781f3ea3
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware delivery. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this malicious intent. Additionally, the PDF exhibits characteristics of a link farm, suggesting it's part of a larger campaign to distribute content or traffic. 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.ru/pify?keyword=yowhatsapp+versi+7.+10
    • http://molavisix.arlingtonroofingco.com/uploads/1/3/1/8/131871727/jupusirozufigifijuru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/faramerujinusopuko.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/suzuwofopifezipapux.pdf
    • https://cdn.shopify.com/s/files/1/0439/5371/7406/files/xusawatoxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7093/files/kalikasan_ng_akademikong_pagsulat.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8188/files/ganazasoxuxafu.pdf
    • https://cdn.shopify.com/s/files/1/0440/7659/7413/files/sofidaboligabefuveto.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdf
    • https://cdn.shopify.com/s/files/1/0447/9139/8561/files/python_move_file.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7504/files/36445956360.pdf
    • https://cdn.shopify.com/s/files/1/0428/8852/8035/files/lurudunop.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/xerusezatexupixevenulomin.pdf
    • https://cdn.shopify.com/s/files/1/0433/6769/4487/files/51635906279.pdf
    • https://cdn.shopify.com/s/files/1/0432/9845/5705/files/british_english_vs_american_english_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/6658/8325/files/47470370860.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_off00007866.bin
e0a1318e29f83440216ed2a13d5d5d1a98b42c10a73755f0f238d470cc196ec0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7866 5292 bytes
font_01_sfnt_off00008a8f.bin
253fda74336037b7507972bd822eb3260c407dd136d2bbba9efec881cf59111c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8F 10052 bytes