Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0259f1ff8c2419…

MALICIOUS

PDF

44.0 KB Created: 2020-08-06 12:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29f45bb3913313aad863955e540a55c0 SHA-1: c6f9a1000db5d9c20d2b1918797119702a35f675 SHA-256: 6a0259f1ff8c2419b6557f3012d2331fec08b0119f374a9762c794096d56922b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or SEO spam campaign, aiming to drive traffic to malicious sites.

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=enteric+nervous+system+pdf
    • http://files.goliadathleticboosters.com/uploads/1/3/1/8/131860938/9dfd82f4c01.pdf
    • http://files.perfectprotection.shop/uploads/1/3/0/7/130739415/8445331.pdf
    • http://files.charlotteshelix.net/uploads/1/3/2/6/132681586/e94f9231ec00a3.pdf
    • http://files.westernshirtsnz.com/uploads/1/3/1/4/131406082/pupufitalekimu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/5795/5487/files/sticky_navbar_bootstrap.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/pafasulovunanonizejejek.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9563/files/zigitatefijiwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/17091376300.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sabam.pdf
    • https://cdn.shopify.com/s/files/1/0428/0755/8310/files/vamizeroki.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/80721089566.pdf
    • https://cdn.shopify.com/s/files/1/0437/6382/6849/files/mekuraxoziles.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86399573169.pdf
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/14231901944.pdf
    • https://cdn.shopify.com/s/files/1/0433/7998/2492/files/jewituvukizanalaz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061d0.bin
93f54f28d2e291aa91d36ffc43cee7f675f8b792d42f40eac78d60cb1a491f1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D0 5060 bytes
font_01_sfnt_off000072f7.bin
5bf63bd867b7fff34e4a48d5eb30429c0da96682a8ecefc760d933f9c7c2fce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F7 10032 bytes
font_02_sfnt_off0000954d.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x954D 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.