Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a881888760cc2f4…

MALICIOUS

PDF

43.6 KB Created: 2020-08-30 04:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1418b05ce0d497e3f15ea5c78296b21f SHA-1: e7b58b89ad0d4ceb6006e67223b2ffe50a245a2b SHA-256: 7a881888760cc2f48917ea217839c53ea127ca9916a9aa06b5da5a99a26a1d60
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document also contains a large number of links to benign Shopify-hosted PDFs, likely as a SEO spam tactic to mask the malicious link. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggests a phishing or redirection attack.

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=eve+online+vs+elite+dangerous
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/2882/4742/files/nato_phonetic_alphabet_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/9939/8052/files/67821540023.pdf
    • https://cdn.shopify.com/s/files/1/0438/5865/7430/files/mitral_valve_disease_in_dogs.pdf
    • https://cdn.shopify.com/s/files/1/0433/0812/2280/files/8664808998.pdf
    • https://cdn.shopify.com/s/files/1/0437/8093/1742/files/wuvuvivelux.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/business_administration_text_books.pdf
    • https://static.usrfiles.com/ugd/2813e2_765b3730d9f1467db8c7c2e69a26a6e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_cbda758230b241de9036bcb26d05e40c.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_8d471ebdc7f9441ca29673c684adf0cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7e2ed379c2d4a73964be2ed66dd4f5c.pdf
    • https://cdn.shopify.com/s/files/1/0435/2435/8308/files/george_mccrae_rock_your_baby.pdf
    • https://cdn.shopify.com/s/files/1/0430/4394/6649/files/cedulas_ecuador.pdf
    • https://cdn.shopify.com/s/files/1/0435/9723/4338/files/97753920974.pdf
    • https://cdn.shopify.com/s/files/1/0431/2236/0469/files/evermore_alyson_noel.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/xavanowoda.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_off00005418.bin
a5e9133e4f7d25ca2ecbb06200e5d4f294ebd067b2e30e933fe048254113e32d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5418 4892 bytes
font_01_sfnt_off000064d0.bin
ea6f36eac56d16b389cb9951b56b45ce45577ccd91f74b9d84beb0b000a16ac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D0 14832 bytes
font_02_sfnt_off000093b0.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93B0 4324 bytes

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