Malicious PDF — malware analysis report

Static analysis result for SHA-256 04484184c6727f6f…

MALICIOUS

PDF

120.4 KB Created: 2020-08-02 10:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06ae60633d8a25a590e6f02cdcbba554 SHA-1: 1945b68995cd41b4d4039b18fc74c07ca53ac755 SHA-256: 04484184c6727f6f4fb2097a0e9a8d8af3bd5bf30ab40cbddf5d200eef7bd1f9
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Omsa 8. 4 windows'. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic, likely to drive traffic to malicious sites.

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.ru/pify?keyword=omsa+8.+4+windows
    • http://files.ontheedgeofreason.com/uploads/1/3/1/4/131408170/521b71c0418ccf5.pdf
    • http://files.quebecmusiccompetition.com/uploads/1/3/0/8/130874284/fusuze_jewojare.pdf
    • http://files.gnosiscanberra.org/uploads/1/3/2/7/132740277/gusebevepef_jigakew_sezagirubijif.pdf
    • http://files.fccsewingministry.com/uploads/1/3/0/9/130969061/gateko_wujuzukezosowu_puwivuroxudaz_naxejusawubetuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3313/3209/files/babufixoxuduporizekerida.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sigejorivuzogekos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0042/1790/files/39474533734.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3794/files/best_android_gba_emulator.pdf
    • https://cdn.shopify.com/s/files/1/0430/7009/5521/files/xalowakutobiworiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/3897/2831/files/tiwazuwezevo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4731/3827/files/tinorexepelomamefibida.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/12967942943.pdf
    • https://cdn.shopify.com/s/files/1/0438/9715/9832/files/63527552680.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/53917261770.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4933/files/68057686208.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018e0d.bin
8d3d2f333a85dcfe555780cd1edbb7ee6e4ee8a8404a55f0f500f12beea6a3f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18E0D 5276 bytes
font_01_sfnt_off0001a008.bin
ed7d231c5866f958f8ffe9c8494235d9e37e24982f9667f84ebe90ba2f8cfad6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A008 16904 bytes

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