Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cdaf9bcafdaaeab…

MALICIOUS

PDF

41.0 KB Created: 2020-08-13 21:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6e43b181f98b071440dca809b8e2fc6 SHA-1: 68eb04706b57680eaec83504e4845d4ac49e9f23 SHA-256: 7cdaf9bcafdaaeabd332133634a22293d7dec4ffcc3b10e2891f1083636d144c
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. One of the primary links directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Fujikura 70s fusion splicer datasheet' and includes the malicious URL, suggesting a lure to a fake datasheet page. No scripts were extracted from this sample.

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=fujikura+70s+fusion+splicer+datasheet
    • http://popili.theendlesslight.com/uploads/1/3/2/6/132695663/7f3487dcf.pdf
    • http://dagumis.happygreenjeans.com/uploads/1/3/0/8/130873851/36b336e592.pdf
    • http://files.ravennationarmy.com/uploads/1/3/2/7/132741194/wexifofiluvomopola.pdf
    • http://files.samandlorisduo.com/uploads/1/3/0/8/130813111/mojap.pdf
    • https://cdn.shopify.com/s/files/1/0437/6910/2485/files/namadidojugidatememizapuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/4624/7332/files/gosupirok.pdf
    • https://cdn.shopify.com/s/files/1/0435/4555/9189/files/51650281863.pdf
    • https://cdn.shopify.com/s/files/1/0440/1260/1502/files/bejuwiziraruka.pdf
    • https://cdn.shopify.com/s/files/1/0447/0548/0858/files/wunisebupezimorojoteba.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/matching_supply_with_demand_cachon.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/diridetagu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/66414345813.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1550/files/fundamentals_of_modern_manufacturing_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/52919814827.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/zaloxobire.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_off00005e64.bin
b60400353f7f9de1764525dae0e51356799c6f0f2c1575d89723627180434815
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E64 5560 bytes
font_01_sfnt_off0000714d.bin
b7d4887b17d8673873321620c0c61e6a489a8e77fe7f318c5151cc6c49eef976
pdf-font-stream PDF embedded font (sfnt) at offset 0x714D 11140 bytes