Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d52f53354e49f29…

MALICIOUS

PDF

47.6 KB Created: 2020-08-30 18:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e2bf1215868569a4f4b6b15e1923f35 SHA-1: 853fa7d1f7bf1b0fef0786885103bae018dee087 SHA-256: 0d52f53354e49f296b01a16e006bdde9f12bf5f924cc1c844fa641ec42f7452c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at 'https://ttraff.ru/wix?keyword=entropia+universe+hunting+guide'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure. The presence of a large number of external PDF links indicates a potential SEO link farm tactic. No scripts were extracted from this sample.

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/wix?keyword=entropia+universe+hunting+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/34318558171.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/46677450904.pdf
    • https://cdn.shopify.com/s/files/1/0460/3717/2383/files/dean_lewis_waves_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/4754/1146/files/67496502941.pdf
    • https://cdn.shopify.com/s/files/1/0428/8443/2038/files/field_cancerization.pdf
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/betazok.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7914/files/battlestar_galactica_razor_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/jinedilukoriwaxajawepevag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/46036262381.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977390730.pdf
    • https://cdn.shopify.com/s/files/1/0460/3281/4244/files/9676214649.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/posisufotibanubofigejikam.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_off00007c4e.bin
39468a0a137bb8b39fb4ee571cf5fef1b83a9fd458faa328dd5ccfbbf1134169
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4E 5208 bytes
font_01_sfnt_off00008e01.bin
9d259930216e28cecbb141ef26a563f30713153da620e6777495b1f4c0a89b88
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E01 10504 bytes