Malicious PDF — malware analysis report

Static analysis result for SHA-256 d173e1ff03c06c7c…

MALICIOUS

PDF

44.2 KB Created: 2020-08-10 15:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f60661bf1b6d7a4a5a723b717aba7331 SHA-1: a460d88261fff90b55c392df7234049fb264f225 SHA-256: d173e1ff03c06c7caf7a5665879cf658d68084301a166b20fdd76912c6cb1986
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects through ttraff.cc, a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'exercises with answers pdf' and the malicious URL, suggesting a lure. The heuristic 'SE_MFA_LURE' indicates the document is designed to harvest credentials or MFA approvals. No scripts were extracted, but the primary attack vector appears to be the malicious redirector link.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=causative+have+exercises+with+answers+pdf
    • http://files.emilystillings.com/uploads/1/3/0/7/130775846/e9c31d6.pdf
    • http://files.ezservicelist.com/uploads/1/3/2/7/132741110/pefesepo_vatikuzaxojux_moxurabeluri.pdf
    • http://files.alexismahdavi.com/uploads/1/3/1/3/131380008/5d82e573.pdf
    • http://files.decadentaffairsco.com/uploads/1/3/1/4/131407492/20853.pdf
    • https://cdn.shopify.com/s/files/1/0440/4792/5413/files/bb_clarinet_finger_chart.pdf
    • https://cdn.shopify.com/s/files/1/0440/1784/4382/files/fexarasozesigajogilugazo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/xedidafu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/kuxoxenunofotuvuri.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/dinesh_biology_class_10_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/dajawosarewumutumin.pdf
    • https://cdn.shopify.com/s/files/1/0436/2862/6080/files/jilojoditek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80787326618.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5208/files/5097215976.pdf
    • https://cdn.shopify.com/s/files/1/0434/6327/8758/files/urticaria_cronica_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0428/4681/4374/files/gafide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/26798356247.pdf
    • https://cdn.shopify.com/s/files/1/0430/4565/0586/files/12517453388.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/kuluwozejozusobaxuz.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_off00006d81.bin
73e32a2a0c3ad9982e2c1ddc1ae704e6b949a8b1dbe0f1cea3e476a9486558a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D81 5336 bytes
font_01_sfnt_off00007fb5.bin
f8cc4cf412ccde0c416450e91ca5d4874575c0efd8cec84f8ac13f2cce636f55
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB5 10532 bytes