Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d524c52e9f6bd80…

MALICIOUS

PDF

41.8 KB Created: 2020-08-21 14:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3078d17a7861fa9c8da1a825091151fb SHA-1: 4e98ee8f4740d5881dfc23915a7622516b6061c7 SHA-256: 1d524c52e9f6bd80092ac0938d5f6fb4ec3bc6605368ed4b7b0ea9baa2806fb5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'photo editing' and a URL that appears to be a lure. The PDF also contains a large number of embedded links, many of which point to shopify domains, suggesting a link farm or SEO poisoning tactic. The primary malicious IOC is the ttraff.com redirector URL.

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=photo+editing+picsart+photo+studio+android
    • http://files.honorelighting.com/uploads/1/3/0/9/130969681/f301775d8b0f.pdf
    • http://faned.wabseny.com/uploads/1/3/0/7/130739978/mimubutusul.pdf
    • https://cdn.shopify.com/s/files/1/0431/8733/9413/files/potej.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/gauge_pressure_and_absolute_pressure.pdf
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/rogusutenugu.pdf
    • https://cdn.shopify.com/s/files/1/0464/1203/8312/files/bokobekebewurit.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/properties_of_organic_and_inorganic_compounds.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2367/files/jifukesodi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5067/2026/files/bumoworaziropomivaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdf
    • https://cdn.shopify.com/s/files/1/0431/6220/6357/files/13143750709.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7181/files/boiler_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/luliwafepapenasezugifutaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2869/2643/files/51837839626.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_off00005702.bin
c69eb32c77efb417ddce2c2c60f1b780e3247ec244ac7fe8d1a728767e398680
pdf-font-stream PDF embedded font (sfnt) at offset 0x5702 5184 bytes
font_01_sfnt_off00006890.bin
d63cd065df03486f2110ae9f05f09555d6a91047b528e29863dae50efaad0575
pdf-font-stream PDF embedded font (sfnt) at offset 0x6890 10448 bytes
font_02_sfnt_off00008c4e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4E 4324 bytes