Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cfe2ef1cfc13152…

MALICIOUS

PDF

46.9 KB Created: 2020-09-19 03:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c63be105d3c4cfbf1d5f257bf6f62e98 SHA-1: 3fb1476363b2e560e87813b82511bd8caeba7540 SHA-256: 2cfe2ef1cfc131525fe09d2804d82b32697b46e8899e27c918c76ac892c7450b
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=manual+starcraft+2'. This URL is presented within the document body, suggesting a social engineering lure. The presence of a large number of external PDF links further indicates a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious.

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.link/wix?keyword=manual+starcraft+2
    • http://gibojixi.downtownnewhavenmo.com/uploads/1/3/1/1/131163914/pezajama_loviw_dokeme_manidizujuwanuf.pdf
    • http://files.ukulelebuyingguide.com/uploads/1/3/1/3/131379552/lifarigaxepidub.pdf
    • http://files.helpbuildit.net/uploads/1/3/2/6/132695741/govedopogel_kujavadutuxa.pdf
    • http://files.oakmontart.com/uploads/1/3/2/3/132302993/xiginegesakolokoke.pdf
    • http://kopabo.westchesteryouthchoirs.com/uploads/1/3/1/3/131378850/kuzevupik.pdf
    • https://4bf6e812-4a3e-4f03-8714-e031f9b27ec0.filesusr.com/ugd/04c368_e05f7b479816431598ca77b08bdd2aa5.pdf?index=true
    • https://47f824a1-8c2d-4fc5-b40b-a4381d7bb6ba.filesusr.com/ugd/e1d12c_786e6810450c424b965b413afc1f7215.pdf?index=true
    • https://4def731d-9c11-41c9-824c-b9f70e5640a3.filesusr.com/ugd/0789d5_b69b5dfd45ea41d99fe42fc1f72c2884.pdf?index=true
    • https://82bab47d-478d-4a31-9721-58aea85b2db3.filesusr.com/ugd/1e8759_2b996c30ca0742d98cb862278c37b42e.pdf?index=true
    • https://63b337fc-c8d0-48c5-afd4-830cca7c34c1.filesusr.com/ugd/23b571_084a98bb31db4af18de5c306d8cbd44c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0436/4143/8366/files/gudatixapedepaj.pdf
    • https://cdn.shopify.com/s/files/1/0465/3472/1694/files/laraxefurowizi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2998/5430/files/83356290947.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a14.bin
d2769aaa7c24c628201d2813d1289a6e1024659997fe5ccf3ad7cd4d37df3982
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A14 5012 bytes
font_01_sfnt_off00008b3c.bin
83e8f2f26a49cba2fac4e1284b4035227760b74bb5024d9a100f1a200d7a9a74
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B3C 10436 bytes