Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f085947be7818de…

MALICIOUS

PDF

50.0 KB Created: 2020-08-20 22:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e7fe28c502c6998e818efc4d6939e1a SHA-1: 57360ff565256ba7916a502e878089ac84696064 SHA-256: 1f085947be7818de5c5ff3f0dd6810fcfdc7d1c01510d9a63fd910a8addcf949
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL. This suggests a phishing or scam attempt where the user is tricked into clicking the link, likely to download further malware or be directed to a fraudulent 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/pify?keyword=asterisk+sans+pro+free
    • http://files.cdhc.org/uploads/1/3/0/8/130814205/zoreruxebebemiv.pdf
    • http://kemewe.taberlawgroup.com/uploads/1/3/1/6/131606552/6562257.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/corazon_de_nio_libro.pdf
    • https://cdn.shopify.com/s/files/1/0427/5719/3895/files/16482071577.pdf
    • https://cdn.shopify.com/s/files/1/0438/1389/6352/files/s_u_bahn_berlin_liniennetz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7733/files/69260340212.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/28646010128.pdf
    • https://cdn.shopify.com/s/files/1/0430/5407/1957/files/vuzusulipapegijat.pdf
    • https://cdn.shopify.com/s/files/1/0429/2496/6044/files/75116186792.pdf
    • https://cdn.shopify.com/s/files/1/0430/1222/7225/files/49240747872.pdf
    • https://cdn.shopify.com/s/files/1/0435/5126/0823/files/72470049178.pdf
    • https://cdn.shopify.com/s/files/1/0458/6579/5737/files/haryana_news_election_ki_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/49282840980.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/98347701693.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nawujumukupuzuwoxelojoses.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006382.bin
c83e8d91714c5692c6aa462878ef68b69e268858cf13a625a6d615285332e710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6382 4704 bytes
font_01_sfnt_off0000737f.bin
40632c1c8d5c3a9c87cc2aa52ef6984e6ba4825adebfe6d6b548a5bdd6849410		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737F 10664 bytes
font_02_sfnt_off0000981f.bin
a3b8ae6cb61a975f1aaa3bdf1d75290c2750726bc6c8d8b6ec62e4e9f5cc9978		 pdf-font-stream PDF embedded font (sfnt) at offset 0x981F 16084 bytes
font_03_sfnt_off0000acd5.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACD5 4324 bytes

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