Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a2673c15fb24a8…

MALICIOUS

PDF

99.4 KB Created: 2020-08-31 16:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a6fdeb4134da5f5c5e7f4fbf3e1a40d SHA-1: 1a7e8c2535199ee9ce829b23b3b313c30d7b8d85 SHA-256: 61a2673c15fb24a8b3103c22271819eb2d3e87164b67d209b003fea4bebd7455
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct the user to malicious infrastructure. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate a malicious intent, likely related to phishing or malware distribution.

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/wix?keyword=12+years+a+slave+imdb+parents+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_4f64df21bf014d7ab3f38b55f712d9d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_d25786d40b1d4cacbd87e06b49caf7a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_47b202d7a54d49bcb8fff20e4828ace3.pdf
    • https://static.usrfiles.com/ugd/b8c837_e93bba4aaf294c8580a8d5815231a183.pdf
    • https://static.usrfiles.com/ugd/cec570_8d144078eac44651aa57b69e956f92d7.pdf
    • https://static.usrfiles.com/ugd/9ea91e_c745e7b235b04df3a50005810231d6ae.pdf
    • https://static.usrfiles.com/ugd/badafb_87e71506d2474bf0bcff50593f11daaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/columbus_dispatch_sports_reporters.pdf
    • https://cdn.shopify.com/s/files/1/0436/7928/5401/files/pusunazogesuwadetetune.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/61350540265.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/mukisigirejagurim.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/37379170691.pdf
    • https://cdn.shopify.com/s/files/1/0428/4314/4355/files/15805095227.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3816/files/ark_pillar_trick.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_off00013971.bin
7cc3b7014bdfa032409f7e7f622a7f12af08f13ca1d5b55b483e57caceb9e11a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13971 5444 bytes
font_01_sfnt_off00014bd8.bin
41569c1def640709e1d738a910477092103cda9cdba2d01dba85cee3405c051c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BD8 11348 bytes
font_02_sfnt_off000171d6.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x171D6 4324 bytes

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