Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3730c42a3bcc5f…

MALICIOUS

PDF

57.9 KB Created: 2020-08-24 19:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8311b6e7879331cae9e395b873f58a0c SHA-1: 4ad839c556ce8f457ce3e37882670c1dfc131f97 SHA-256: fe3730c42a3bcc5fbbd496c6695af6452feb267273be18475447ebb5cfdb6a2f
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a common tactic for SEO link farms. One of the primary links, 'https://ttraff.cc/pify?keyword=guided+math+stations+kindergarten', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting it is the intended lure. The presence of numerous benign-looking Shopify links alongside the malicious one is likely an attempt to obscure the malicious intent.

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.cc/pify?keyword=guided+math+stations+kindergarten
    • http://fivadofi.paloaltoglass.com/uploads/1/3/1/4/131407233/96cc54cf5aa302f.pdf
    • http://files.jeffreyburghauser.com/uploads/1/3/1/6/131606876/kufopu_mogefufuzasarex_pexarig.pdf
    • http://files.medicarespecialist.com/uploads/1/3/1/4/131409526/85443854282bc.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8418/files/maths_problem_solving_puzzles.pdf
    • https://cdn.shopify.com/s/files/1/0431/4130/0380/files/77826975185.pdf
    • https://cdn.shopify.com/s/files/1/0429/1140/0102/files/uses_of_computer_in_various_fields.pdf
    • https://cdn.shopify.com/s/files/1/0434/5715/1142/files/juroretosilaxetola.pdf
    • https://cdn.shopify.com/s/files/1/0431/6987/4080/files/monetary_theory_and_public_policy_kenneth_kurihara_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2479/files/unikey_win_7.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/bijinufigawejumamujevido.pdf
    • https://cdn.shopify.com/s/files/1/0429/0464/9884/files/79674769591.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/zibewapagabadeduxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/foxofopa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/96877916626.pdf
    • https://cdn.shopify.com/s/files/1/0438/0819/4722/files/jurnal_media_pembelajaran_audio_visual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/xeduxami.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_off00009820.bin
f0e2a4539af435a3f11047fbac1b740f826cfa582548fbd4f840a1e5eb329426
pdf-font-stream PDF embedded font (sfnt) at offset 0x9820 5184 bytes
font_01_sfnt_off0000a995.bin
1ee4aa52cbeafd893527f3cf0451250f1a65f17dbd2456aaf5158ad87ec9a2b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xA995 10176 bytes
font_02_sfnt_off0000cc2c.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2C 4324 bytes