Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45848a0d2ba0137…

MALICIOUS

PDF

48.2 KB Created: 2020-08-20 13:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8739c4d92d39721050520ee11b51549 SHA-1: 4954d792e2383d1d5b7a7c6e12b5a01318ddc55a SHA-256: d45848a0d2ba01379d4e984d1bab347ce013b92599d20cf5bb764629bc3b20d4
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL is https://ttraff.com/pify?keyword=biodata+format+template, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. No scripts were extracted, but the link farm and redirector strongly indicate a phishing or malware distribution attempt.

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/pify?keyword=biodata+format+template
    • http://files.oxnard-photography.com/uploads/1/3/0/8/130814411/525006f2b.pdf
    • http://vedeji.coronafire.org/uploads/1/3/0/7/130740596/9863830.pdf
    • http://files.thechipride.com/uploads/1/3/0/7/130776632/2446714.pdf
    • http://files.stmarys-stjames.org/uploads/1/3/2/6/132681891/zetofoza.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/7230226167.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/71672484674.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5451/files/caverject_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2785/files/chal_chaiya_chaiya_dj_shadow_song.pdf
    • https://cdn.shopify.com/s/files/1/0435/0512/3493/files/33267784075.pdf
    • https://cdn.shopify.com/s/files/1/0432/1565/0980/files/13664041406.pdf
    • https://cdn.shopify.com/s/files/1/0427/9749/8535/files/the_cambrian_fossils_of_chengjiang_china.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/92510048618.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/5696252468.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8239/files/biblioteca_online_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0438/3490/0637/files/airdroid_apk_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/gigot.pdf
    • https://cdn.shopify.com/s/files/1/0433/7955/6504/files/32314328783.pdf
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/absalom_absalom_faulkner_download.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_off00008028.bin
32133dba079f8736bbe1b7c736440608ee0e0004a77cc023bd71f1284d9c0011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8028 5056 bytes
font_01_sfnt_off00009145.bin
5627e84ad09076d05132252de7bc2d54c7be2d3d55d2e23433efd1efad8da1bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9145 10184 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.