Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a20844d7a13eee7…

MALICIOUS

PDF

54.6 KB Created: 2020-08-09 10:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19ec04771382d76ee2fdcf8e37814f3b SHA-1: 53df121c5a32b57a65c39cf242427c298aaba7e2 SHA-256: 2a20844d7a13eee7935f53cec5406a8300fb37fd4eb7f16ba369e158ab8f0b11
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=evermotion+archinteriors+vol+41+showroom+pdf', which is also flagged as a malicious redirector. This suggests the PDF's primary purpose is to redirect the user to a malicious site, likely for phishing or malware delivery. No scripts were extracted from this sample.

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.ru/pify?keyword=evermotion+archinteriors+vol+41+showroom+pdf
    • http://files.dkgmd.org/uploads/1/3/1/4/131438443/5917786.pdf
    • http://zonolaxet.valhallavet.com/uploads/1/3/2/8/132814930/e79d063ec7857a.pdf
    • http://files.justinecandoit.com/uploads/1/3/1/4/131453156/9813528.pdf
    • http://files.seanjonesfitness.com/uploads/1/3/0/9/130968921/0a8a55ab3ace6.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/vugadesoxewemo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6839/1591/files/86040081059.pdf
    • https://cdn.shopify.com/s/files/1/0429/8260/4963/files/modesabox.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/85148385029.pdf
    • https://cdn.shopify.com/s/files/1/0432/0899/9074/files/vojuzaxolumez.pdf
    • https://cdn.shopify.com/s/files/1/0435/2511/1967/files/mumarilajitox.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/momotega.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/61224018244.pdf
    • https://cdn.shopify.com/s/files/1/0440/9711/0168/files/persona_5_rom.pdf
    • https://cdn.shopify.com/s/files/1/0441/2411/1000/files/age_problem_solving_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files/todupajufazuzivumozopurew.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1040/files/42398242861.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/metro_map_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74098669839.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_off00005659.bin
768bad3a5f22b0523bc32d7b1be7e521cd67dcaac30001f47f0a0d23b8a25a55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5659 19180 bytes
font_01_sfnt_off00009351.bin
3feb9a602d1e00a338dbfbc92cd372b63457176529bc9df64a8de5a18300fdbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9351 5644 bytes
font_02_sfnt_off0000a67b.bin
d0dc8b1de27b481b5eb2cb9aec6916561fd2518905eaad76e4efbf4836890f58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA67B 10456 bytes

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