Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d0737605719602…

MALICIOUS

PDF

49.7 KB Created: 2020-08-12 02:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cdf9f22d47bba354dd6c40c2145595b SHA-1: c11f622bc385fe4de4af9bf545bdff23519b9042 SHA-256: 12d07376057196021324ff3cdab16e7440116ad89b6327ee0a13f9de009dbe3d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc), which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains text related to 'Acinetobacter baumannii antibiotic resistance pdf thesis submitted', likely a lure to attract victims interested in academic content.

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=acinetobacter+baumannii+antibiotic+resistance+pdf+thesis+submitted
    • http://files.diopayouth.org/uploads/1/3/1/3/131380094/gojeforezow.pdf
    • http://fegase.electricimpulsecloggers.com/uploads/1/3/0/8/130814328/bevadebajuz-defuwuv.pdf
    • http://files.8trackbooking.com/uploads/1/3/1/4/131407530/kutudixusokoginavu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/tubaserojizox.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/4592053086.pdf
    • https://cdn.shopify.com/s/files/1/0433/9843/0876/files/ils_ont_mang_mon_fils.pdf
    • https://cdn.shopify.com/s/files/1/0436/0346/0259/files/beautiful_in_white_piano_sheet_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/7840/9622/files/104045.pdf
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/i_before_e_exceptions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wudivilijekeroleve.pdf
    • https://cdn.shopify.com/s/files/1/0438/3096/8480/files/70756009137.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/zivudepekidol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4274895189.pdf
    • https://cdn.shopify.com/s/files/1/0435/2039/3380/files/technical_drawing_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0428/1945/3095/files/94363685267.pdf
    • https://cdn.shopify.com/s/files/1/0437/4052/8792/files/it_ebooks_free_download.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_off00007840.bin
240739477f0001321c466cdc7bb743772a96fdd89d088856d04c48f42539b331		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7840 5492 bytes
font_01_sfnt_off00008aaf.bin
a6a38fd5c4ca57e404461600ca6546e0d656a3a6b512dc036464bc77e4d60882		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAF 15172 bytes

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