Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03ae63e6419bfbd…

MALICIOUS

PDF

44.4 KB Created: 2020-08-18 19:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e137b0ee0b0f34b1c0631ac6d31eb93e SHA-1: e1440fa9dfb4d1fef4d56171be3c4d3a8e1905f9 SHA-256: d03ae63e6419bfbd70942d1e466940a540460f7ac70fe328d194b61d56269e40
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic firing for a malicious redirector link. The document body and embedded artifacts indicate it is a link farm, with the primary malicious URL being https://ttraff.cc/pify?keyword=3d+map+making+software+free. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or malware distribution.

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=3d+map+making+software+free
    • http://files.stoneranchpta.org/uploads/1/3/0/8/130874058/3ad047b376b9b9.pdf
    • http://files.mkclardy.com/uploads/1/3/1/0/131070374/pajodojig.pdf
    • http://files.sweetpapercreations.com/uploads/1/3/0/9/130969712/wosejitulegovo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6908/files/bootcamp_drivers_windows_10_6._1.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4199/files/ayyappa_bajana_songs_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8093/1733/files/79608559065.pdf
    • https://cdn.shopify.com/s/files/1/0437/4321/5767/files/jump_throw_bind.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2242/files/affidavit_of_support_form_australia.pdf
    • https://cdn.shopify.com/s/files/1/0436/0352/5794/files/ipratropium_bromide_davis_drug_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1866/files/fekaviku.pdf
    • https://cdn.shopify.com/s/files/1/0433/4695/2351/files/warfarin_initiation_nice_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mevebetivegukubevam.pdf
    • https://cdn.shopify.com/s/files/1/0428/7892/7011/files/89246906407.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/free_online_books_download_sites.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_off000061ce.bin
5d1c18db89a17904ad6586d8bc2dc5f7aa8084b8ac8c053e9b5c62fae19358f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CE 5344 bytes
font_01_sfnt_off000073ea.bin
57a713e623cbeddb5e9269ca89956aec647b3caf46feaa224e5c6de87ee67d7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EA 10196 bytes
font_02_sfnt_off000096d8.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96D8 4324 bytes

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