Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a058daeb0787f27…

MALICIOUS

PDF

42.9 KB Created: 2020-08-12 21:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1830fc423965e95c4145ee6de712cdf3 SHA-1: 0b817ed11902043279920bb69f06122dcc1b4683 SHA-256: 3a058daeb0787f27985affb6bc19a6713416746cad1aa7524b2917d8e4b21c90
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the document links to known malicious redirector infrastructure, specifically `https://ttraff.com/wb?keyword=hak%20asasi%20manusia%20menurut%20para%20ahli%20pdf`. The document body, though partially corrupted, also contains this URL and other Shopify-hosted PDF links, suggesting a link farm or redirection scheme designed to lead users to malicious content. 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.com/wb?keyword=hak%20asasi%20manusia%20menurut%20para%20ahli%20pdf
    • http://files.hoffmannlabradors.com/uploads/1/3/1/1/131163620/4654660.pdf
    • http://zafenoxow.shannonsfitnessdance.com/uploads/1/3/1/4/131407117/2d9917247aee.pdf
    • http://files.nachmanlab.org/uploads/1/3/0/8/130813972/fc3f293d83.pdf
    • http://files.artemleaders.com/uploads/1/3/0/9/130969580/7741394.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31931154882.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/architectural_drafting_residential_and_commercial.pdf
    • https://cdn.shopify.com/s/files/1/0435/5738/8451/files/holy_bible_nkjv_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/gavemoni.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6156/files/gowoseremuzeku.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1802/files/jirigawulujujaxum.pdf
    • https://cdn.shopify.com/s/files/1/0430/0305/2191/files/62968005945.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/overhead_door_legacy.pdf
    • https://cdn.shopify.com/s/files/1/0440/8924/5861/files/26916128822.pdf
    • https://cdn.shopify.com/s/files/1/0436/2777/4115/files/rangkuman_materi_biologi_sma.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5303/files/19182849985.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/49823961574.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_off00006ae1.bin
6e07e2e970f227e914649b7b115df3900cb70cac752ca2b55f90b904b8030348		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE1 5308 bytes
font_01_sfnt_off00007cbb.bin
fa9c6cd447f083942ac0c2b870e3cfd078c5324bb7c3ed1774356b7381179d69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBB 9892 bytes

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