Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc022e3833ef866…

MALICIOUS

PDF

61.0 KB Created: 2020-09-13 03:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04980798a795a65e1381585e9478cd4f SHA-1: 6a02ce5adbb2498b97608133c063f5747bcfe035 SHA-256: 0bc022e3833ef86618a670a8ccafcf8ff336159fe87673b2bd4a0f729aee668e
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a URL associated with malicious redirector infrastructure, disguised as a product manual. The presence of a large number of external PDF links suggests a link farm, potentially for SEO manipulation or to host further malicious content. While no scripts were directly extracted, the PDF structure and embedded links indicate a malicious intent to redirect the user to a potentially harmful site.

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=sony%20playstation%20platinum%20wireless%20headset%20manual
    • http://vixonasif.photosbymiriam.com/uploads/1/3/1/8/131856372/luwetugisido.pdf
    • http://larufas.uciaga.org/uploads/1/3/0/9/130969027/c7ec5.pdf
    • http://files.unifor4000fr.com/uploads/1/3/0/7/130776728/batexup.pdf
    • http://mololof.247racefuels.com/uploads/1/3/1/8/131860553/7247677.pdf
    • http://gokuzuj.bradleyfwb.org/uploads/1/3/1/3/131380397/5957456.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e1d12c_ee04b52bdba94506a61c3d2f14df2c4a.pdf
    • https://static.usrfiles.com/ugd/77eba6_3b41612960e844f1b7ddda66a7922db8.pdf
    • https://static.usrfiles.com/ugd/dd6616_223090689c624d19a45f691ac103ab68.pdf
    • https://static.usrfiles.com/ugd/98e298_5922d9cf574947aa9e4a86eff815a400.pdf
    • https://static.usrfiles.com/ugd/724bd4_746af391a3d94972b4dc6345f194010f.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_217449f673294385b7558388fd2dd119.pdf
    • https://static.usrfiles.com/ugd/3b7182_e4a19f1099ad408cab911203e0ee4dbe.pdf
    • https://static.usrfiles.com/ugd/0e2875_13c3ddd7daf84529afe4a37c8567d333.pdf
    • https://static.usrfiles.com/ugd/58a813_1b368950dcbf4498988599f89259d091.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_31bbb81e44d0425e80d1d6c91cf28e2f.pdf
    • https://static.usrfiles.com/ugd/63f22d_d6d8cb8f705b4bb6a6ae2bb1841d6cb7.pdf
    • https://static.usrfiles.com/ugd/66f3f9_9b8205d29fbe46cfb57e154497bfd303.pdf
    • https://static.usrfiles.com/ugd/33ab24_f407c7a132d543c889fc3fcc55e6a679.pdf
    • https://static.usrfiles.com/ugd/8a9bcc_4f9e4c3751bc4454b5a566cae9da4914.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_off0000a72a.bin
dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA72A 2828 bytes
font_01_sfnt_off0000b124.bin
dac102b3e617046d8f49bd682114aa77c87b1278a93149dda3d0118db813ea90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB124 5496 bytes
font_02_sfnt_off0000c3bb.bin
875c06dda10aa56c4a6c52a433827559bae6ac9f3118203fb7e6b587f78aff8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3BB 10128 bytes

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