Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97bfee0bd09afc4…

MALICIOUS

PDF

42.0 KB Created: 2020-08-11 10:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15c2cca5799deb5db66921fbaf60fbff SHA-1: bda203bf33eaa2612f7775b523bc95c3bbb5d595 SHA-256: c97bfee0bd09afc4201ec4ad12a38fc498c0d6579a5b6515cd7e83d22797a4b4
152 Risk Score

Malware Insights

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

The PDF contains embedded links designed to redirect users to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. It also exhibits characteristics of a link farm, with numerous external PDF links, as indicated by 'PDF_SEO_LINK_FARM'. The document body, though partially corrupted, contains a lure related to a 'whirlpool combo washer dryer manual' and points to the primary malicious URL.

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/wb?keyword=whirlpool%20combo%20washer%20dryer%20manual
    • http://files.irishwolfhoundsvictoria.com/uploads/1/3/2/6/132696233/turosaxosikoxuxax.pdf
    • http://peluvozum.jackpotvapr.com/uploads/1/3/2/8/132814930/wekikigedufiv.pdf
    • http://files.adorndanceandart.com/uploads/1/3/1/8/131856624/fimav-lavirazek.pdf
    • http://files.wakefieldmeadows.org/uploads/1/3/1/3/131381612/lonipewime_xazezuti_lisepunalaxu_kibabuzobudaxof.pdf
    • http://ronij.loveharmonyrecords.com/uploads/1/3/0/8/130874566/7982092.pdf
    • https://cdn.shopify.com/s/files/1/0437/8358/5953/files/levomawi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9160/8227/files/16157886489.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/72904400989.pdf
    • https://cdn.shopify.com/s/files/1/0437/0720/3739/files/promissory_note_in_telugu_format_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3256/8220/files/veni_creator_spiritus_partitura.pdf
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/7549481393.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8252/files/vufazipowapufodoxinazotug.pdf
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/dauntless_fractal_eyetooth.pdf
    • https://cdn.shopify.com/s/files/1/0433/0710/6462/files/fuwikevazezur.pdf
    • https://cdn.shopify.com/s/files/1/0447/3038/4537/files/michael_jackson_type_song_onlineaudio-_converter._com.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9762/files/xudep.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1917/files/53939192413.pdf
    • https://cdn.shopify.com/s/files/1/0440/8436/3416/files/mcas_question_search.pdf
    • https://cdn.shopify.com/s/files/1/0447/0459/6122/files/how_to_make_pumpkin_pie_minecraft.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/
    • https://cdn.shopify.com/s/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006593.bin
0ec91ea951a811f8777a283b420b4aa111cf31d8eb2f0746056248f2b32996cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6593 5660 bytes
font_01_sfnt_off000078b6.bin
47e7ad7c6acd2e89294e99f564e00c73a5c680f11d43634949c4f82747a32421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B6 10004 bytes

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