Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1d606c8657828d…

MALICIOUS

PDF

41.1 KB Created: 2020-08-08 23:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 079a614937fd31ef00d3378b2b024a3b SHA-1: 1d0c45e7bc37a8d3eae6ba2c9b1f5b5d6ad0733d SHA-256: fe1d606c8657828db3aaed7da5c1e9947c039edfa1d074b17e162fe6a51c3554
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains text suggesting it is a lure for a "spatial reasoning book pdf". The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to malicious content, likely for phishing or malware distribution.

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=spatial+reasoning+book+pdf
    • http://files.asklisaraimondo.com/uploads/1/3/1/4/131438188/mejibevof-buvimejow-famunojaxetek.pdf
    • http://files.allinonerenovationsllc.com/uploads/1/3/0/9/130969562/fezuxi.pdf
    • http://files.shaunstournaments.com/uploads/1/3/0/7/130776151/kivosaxaxegaj-geradoba-nupidak-doroxor.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/gutukudulitetomosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/44412723118.pdf
    • https://cdn.shopify.com/s/files/1/0447/1137/9097/files/the_wait_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9885/6871/files/pabuvug.pdf
    • https://cdn.shopify.com/s/files/1/0440/5306/9974/files/bse_odisha_9th_class_history_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6151/8231/files/cinnamon_girl_tab.pdf
    • https://cdn.shopify.com/s/files/1/0433/6143/5813/files/wakakulogemo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/16187507492.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9603/files/pekine.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_off00006215.bin
68581891616e8965da894c870d82bd8d569a4bde6b427ed93098fb0164db2f6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6215 5516 bytes
font_01_sfnt_off000074dc.bin
a735ea4d471dd9ccd5c12ada4697224937ca19141475e6bd7a56974a638558fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x74DC 10224 bytes