Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c1f7e56299277f5…

MALICIOUS

PDF

50.5 KB Created: 2020-08-13 22:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d1aa86f5d365d4d8a19133be166e976 SHA-1: 17d5b86ca06a880ec3c160b02c1af2ed1f7ffd7b SHA-256: 6c1f7e56299277f50b0cd256cd7e1727d399cff272f4c654246ee8b5e549df6d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'VMware nsx manager installation guide' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to host further malicious 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.com/pify?keyword=vmware+nsx+manager+installation+guide
    • http://pupife.beaufortaviation.com/uploads/1/3/2/7/132740978/gojulabejepipal.pdf
    • http://paxamib.freetherobotcoffee.com/uploads/1/3/2/6/132695213/71dea4.pdf
    • http://jateze.golden-meadowlark.com/uploads/1/3/0/7/130775045/daruzobabafem_zixejidipom_xujapibem_zelema.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/1129/2829/files/present_past_and_past_participle_verbs.pdf
    • https://cdn.shopify.com/s/files/1/0437/7447/6440/files/89632759083.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/1160239399.pdf
    • https://cdn.shopify.com/s/files/1/0436/2554/5890/files/16296487266.pdf
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/febawosorokusunug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97897646990.pdf
    • https://cdn.shopify.com/s/files/1/0437/5651/9578/files/45907421090.pdf
    • https://cdn.shopify.com/s/files/1/0429/6533/6217/files/13887974972.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3695/files/80414759368.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1223/files/heartstrings_south_korean_tv_series.pdf
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/metezaramixagowokekevuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/tojajaritajer.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/85497386661.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ff0.bin
db3985236bc00ac0b35fa62818a634ac2a79d385407cda02c88572781501c926		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF0 5152 bytes
font_01_sfnt_off00008159.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8159 1800 bytes
font_02_sfnt_off000089e7.bin
7c6a0fce8931f189d6e8cbdfc028c41d30edd75d2ec118e03aba539a795d6ed0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89E7 10620 bytes
font_03_sfnt_off0000ae14.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE14 4324 bytes

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