Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aeeb602b6416e62…

MALICIOUS

PDF

34.2 KB Created: 2020-09-04 00:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5f47e93f7cbbda6846e41cb80b841e5 SHA-1: 4091b4400999a8fef6b590da1265d3ac614b8521 SHA-256: 8aeeb602b6416e628893ac33a1c0bd759977abd4ec3157f127fc1722a6af8517
152 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ttraff.me, disguised as nutritional information. This heuristic, combined with the ML classifier's high confidence, indicates a phishing or redirection attempt. The document body, though heavily obfuscated, contains the target URL and references to nutritional information, reinforcing the lure. The presence of numerous links to static.usrfiles.com suggests a link farm used for SEO poisoning or distributing 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.me/wix?keyword=sapporo+beer+nutritional+information
    • https://static.usrfiles.com/ugd/158fb9_acdc851d7703403896a1a71e394e6e1b.pdf
    • https://static.usrfiles.com/ugd/89c6ad_1bc9fdabd9e84c21a672565adeed61ec.pdf
    • https://static.usrfiles.com/ugd/fa6f14_7b28581c1fb5459ba402ed61ead9ce00.pdf
    • https://static.usrfiles.com/ugd/4b68be_bd7b5958909347d4bd84d14186fdf67a.pdf
    • https://static.usrfiles.com/ugd/09273f_2e3b42eda73544899e9157a8e9db4d09.pdf
    • https://static.usrfiles.com/ugd/9f6a24_12910653756a45478d24b47f2f571a7b.pdf
    • https://static.usrfiles.com/ugd/2f8cea_d35ba0d2e7ff425e865da510fac3aada.pdf
    • https://static.usrfiles.com/ugd/b65acf_5332874114d74f2580f1b350ed0ca235.pdf
    • https://cdn.shopify.com/s/files/1/0432/0909/7376/files/35343996520.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/xesezagiwuvipazo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/cuando_la_tarde_languidece.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/tukevumirip.pdf
    • https://cdn.shopify.com/s/files/1/0440/3573/5717/files/fukomol.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_off00004881.bin
3e785869f7363305d2e372b33680c47178624da9d971bfef1ef4fee98c758865
pdf-font-stream PDF embedded font (sfnt) at offset 0x4881 5112 bytes
font_01_sfnt_off000059cf.bin
6bcd9842118689d63f1ffff2c295b49daba79dba6f9336da721394801cf16380
pdf-font-stream PDF embedded font (sfnt) at offset 0x59CF 10116 bytes