Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d950f57b3e7556e…

MALICIOUS

PDF

40.3 KB Created: 2020-08-09 08:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31ddfd402425475abb561dc0f8371129 SHA-1: a91fd46a82b55c3ff64d73abc04303a7b939cd26 SHA-256: 7d950f57b3e7556e9b6dc70fb0d41edc815de87d2a6a6a3bd8f31db200e2cadd
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 the same URL and a reference to 'mapa geologico del peru pdf', suggesting a lure. The ML classifier also strongly indicated maliciousness. The primary IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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=mapa+geologico+del+peru+pdf
    • http://files.samniquekahalsey.com/uploads/1/3/0/9/130969448/ae40cffb.pdf
    • http://zoniv.feedthepassport.com/uploads/1/3/1/3/131379362/talezoliwusasu.pdf
    • http://files.aboutyourresults.com/uploads/1/3/1/4/131453022/7940119.pdf
    • http://jiridulab.dlsequestrian.com/uploads/1/3/2/6/132682883/saduduve.pdf
    • http://files.divideny.org/uploads/1/3/0/8/130814205/5986224.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4156/files/81366034097.pdf
    • https://cdn.shopify.com/s/files/1/0433/6232/0536/files/63894324364.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/fusionner_deux_sans_logiciel.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/2414028857.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2374/files/august_current_affairs_2020_ibps_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/1893/4677/files/android_developer_documentation.pdf
    • https://cdn.shopify.com/s/files/1/0434/0593/4759/files/wwww._dropbox_connect.pdf
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/lifulawun.pdf
    • https://cdn.shopify.com/s/files/1/0432/8659/3694/files/84844320587.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dc9.bin
8f03c4a6e6abf1a34d847450a9ae12b7c0732055d428c9f553ca4af4b184a5ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC9 5152 bytes
font_01_sfnt_off00006f6e.bin
e6084d0bef20120632faac72ac363588f5caf1bdcf6be6f717ecd6766b8558d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6E 10916 bytes