Malicious PDF — malware analysis report

Static analysis result for SHA-256 928824222d903a85…

MALICIOUS

PDF

41.3 KB Created: 2020-08-06 12:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26afd7cee3a225284c33826bcadb64aa SHA-1: 8e2b98f3c47e769e761dc725bce6c56223cb8e5b SHA-256: 928824222d903a85ae6f2991044c2ff34ab868e4b9afa17cb6e34728e1b6dea9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. The document body, though partially obfuscated, also contains this URL and other links to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The primary intent appears to be directing users to malicious infrastructure via the 'ttraff.com' redirector.

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/pify?keyword=blue+bells+of+scotland+trombone+solo+pdf
    • http://files.hansenbuildrestore.com/uploads/1/3/2/6/132696558/xaxebizanexoje_kesakasesel_nerodu_zekabole.pdf
    • http://lutebez.angryorange.org/uploads/1/3/1/4/131482975/miwajosupiwopavi.pdf
    • http://files.silverdollardogs.com/uploads/1/3/2/6/132681488/nupebozazilinivufaj.pdf
    • http://files.upaabc.org/uploads/1/3/0/7/130739678/6541203.pdf
    • http://files.simplysensational5.com/uploads/1/3/1/4/131437222/norevaluta-xepeda-betivok.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0554/files/zulod.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9292/files/sezawomibel.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/p_diddy_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0433/5796/2405/files/managing_workplace_diversity_and_inclusion.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/megitemuveworaves.pdf
    • https://cdn.shopify.com/s/files/1/0450/6884/5208/files/clinical_pharmacy_practice.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6647/files/87173366037.pdf
    • https://cdn.shopify.com/s/files/1/0437/4865/5265/files/59691420579.pdf
    • https://cdn.shopify.com/s/files/1/0436/4409/2566/files/8461109611.pdf
    • https://cdn.shopify.com/s/files/1/0434/9257/3336/files/amazon_in_2020_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0433/8856/7706/files/denuselekemuvedibutezosu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054b1.bin
ac80dcdd28ae6205861ab30c08986fe245082943dfd595ea767d5c961f59080e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54B1 5324 bytes
font_01_sfnt_off000066ac.bin
7cd2afc090dc4332cf9c4510a39d573e4a3062e66c32f2527d9fa9fc6b5b67d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AC 10404 bytes
font_02_sfnt_off00008a50.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A50 4324 bytes

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