Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1fe19d419348f1…

MALICIOUS

PDF

42.7 KB Created: 2020-08-31 04:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 283df2f7bda6156891b8a92450e37857 SHA-1: 656db8159cbbc74a8dbe474f51f407b38b3433d2 SHA-256: 9d1fe19d419348f1a9ea216fd0f65ee22a2146c3c12b490fe6c7799d83b9970d
142 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic identifying a link to a known malicious redirector (ttraff.com). Another heuristic indicates a large number of external PDF links, suggesting a link farm. The document body, though heavily obfuscated, contains the string 'Secret sister forms' and a URL that matches the malicious redirector, reinforcing the lure. The presence of a callback phishing lure heuristic further supports the malicious intent.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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/wix?keyword=secret+sister+forms
    • https://cdn.shopify.com/s/files/1/0431/5552/1687/files/14624748586.pdf
    • https://cdn.shopify.com/s/files/1/0428/5018/9478/files/93210240313.pdf
    • https://cdn.shopify.com/s/files/1/0432/0215/0557/files/ecuaciones_diferenciales_schaum.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/carcinoma_epidermoide_cutaneo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/fundamentals_of_computer_hardware_and_components.pdf
    • https://cdn.shopify.com/s/files/1/0457/5638/3396/files/modeling_of_adhesively_bonded_joints.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/kinubekojuwubawi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/attestation_d_honneur_d_hbergement.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/tujodorofin.pdf
    • https://cdn.shopify.com/s/files/1/0439/6898/7294/files/string_to_byte_array.pdf
    • https://cdn.shopify.com/s/files/1/0438/1723/8688/files/vefalok.pdf
    • https://cdn.shopify.com/s/files/1/0461/9721/1294/files/47961554182.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9309/files/southwest_airlines_case_study_strategic_management.pdf
    • https://cdn.shopify.com/s/files/1/0433/7690/2309/files/punjabi_movies_links.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/english_story_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8719/0434/files/xakad.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/luxepotesetefisolixavujig.pdf
    • https://cdn.shopify.com/s/files/1/0438/1153/7053/files/modupowitazaferas.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/
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/en

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006908.bin
63f7c7831ea403cbe0b3918c21059884008195f25fc094e45f2ce5681bda98e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6908 4888 bytes
font_01_sfnt_off00007990.bin
c28f8cb0b224afe83996b7d57ada8766ad2493f94cb7ad75856ffc5a81b84561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7990 10784 bytes

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