Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ddfa3dbb149a7a…

MALICIOUS

PDF

57.0 KB Created: 2020-08-11 00:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 047f8502b098fa5a9a197d2585469294 SHA-1: 28b81c48d88aa3d8ff5496b7f9f1e57b0aba94c2 SHA-256: d3ddfa3dbb149a7a2eee442c79f05c2f23245e4c1413ca38e56ccdddb37df800
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external resources, a tactic often used to obscure malicious intent. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The document body, though partially corrupted, contains text related to 'maths questions for class 9 pdf', suggesting a lure to disguise the malicious links as educational resources. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=maths+questions+for+class+9+pdf
    • http://damego.guydebordclubofhouston.org/uploads/1/3/1/0/131070356/xufatom.pdf
    • http://zonijodaw.childrenfirst-inc.org/uploads/1/3/1/3/131398140/mofadabasafeloj.pdf
    • http://files.shragagafni.com/uploads/1/3/1/4/131413718/mujuxuxejetuju.pdf
    • http://files.bestecomerce.com/uploads/1/3/0/8/130814636/mozinuvalebumoxuduka.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/59933888924.pdf
    • https://cdn.shopify.com/s/files/1/0437/1572/3414/files/xogabulagatarewufajedi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3959/files/excipientes_farmacuticos_e_suas_funes.pdf
    • https://cdn.shopify.com/s/files/1/0434/5472/6310/files/megizan.pdf
    • https://cdn.shopify.com/s/files/1/0429/5370/3590/files/91336558546.pdf
    • https://cdn.shopify.com/s/files/1/0437/9056/5537/files/argumentative_writing_samples.pdf
    • https://cdn.shopify.com/s/files/1/0435/8009/6667/files/33157510134.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/88715011532.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/44736298693.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/guwesimutetalajizobanubel.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/rifilu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/meningite_meningoccica_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0453/4956/8667/files/atoms_and_molecules_class_9_ncert_notes.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_off0000967d.bin
67a70f63e6946d412a4d799c88435f5cd1e3be968c2dd0f9f7a52a1591d46d40
pdf-font-stream PDF embedded font (sfnt) at offset 0x967D 5528 bytes
font_01_sfnt_off0000a93f.bin
fe9070329e7f168f1a2537e5db46ef58f49adc2074235966c6413addcc799b7d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA93F 14268 bytes