Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d2f8d7ad4677e1f…

MALICIOUS

PDF

70.5 KB Created: 2020-08-15 01:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e76b37e1504b37fe22b987e152eea58 SHA-1: 584e352c2cbcfbe09ea12fe86478554912e74fe5 SHA-256: 4d2f8d7ad4677e1ff85196d4dd79971b70ccd9246846ae5b5656a4acff12185a
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=shakira+waka+waka+video+song'. This indicates the document's primary purpose is to redirect the user to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted, but the embedded URL itself is the primary indicator of compromise.

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.cc/pify?keyword=shakira+waka+waka+video+song
    • http://furazaji.syxtrading.com/uploads/1/3/2/8/132814930/01ae7316d6.pdf
    • http://pofipilak.ksmithla.com/uploads/1/3/1/3/131383544/aca3e.pdf
    • http://files.ginnyscoffeehouse.com/uploads/1/3/0/7/130775393/aa8990.pdf
    • https://cdn.shopify.com/s/files/1/0432/8128/5286/files/pazukijajibafod.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/49983572603.pdf
    • https://cdn.shopify.com/s/files/1/0430/4191/5042/files/xininezisagutesido.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/8410431830.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/22076749209.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/23144332256.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4634/files/91951293450.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/skyrim_filled_grand_soul_gem_id.pdf
    • https://cdn.shopify.com/s/files/1/0435/5060/5461/files/8915577882.pdf
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/bugixife.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_off0000d23f.bin
ec18003f8755fc60140f4ae360b4957b14b8821ec7324f41c4d844b94fd5606e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD23F 5372 bytes
font_01_sfnt_off0000e491.bin
7a9e015586448f6d8d22f9c7454f42ef0a93163cd442a70fa756e6c9bdc58e0d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE491 12492 bytes