Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ba6ffd1e05ea1b…

MALICIOUS

PDF

42.4 KB Created: 2020-08-22 06:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 139aedd95a803c10590f2cfc317cfb2a SHA-1: 6ed16a57d5107b6ba8ba83412c48a20f71947c2f SHA-256: d6ba6ffd1e05ea1b3844d7f913e811b699242abf3e42a14add7dfe6395527b43
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'diagnostic microbiology pdf free' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a link farm and a malicious redirector indicates a phishing or redirection attack. 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=diagnostic+microbiology+pdf+free
    • http://gazuwizit.scottgroom.com/uploads/1/3/0/7/130775934/1731994.pdf
    • http://niminat.turntothework.net/uploads/1/3/1/1/131164250/77027f51bdea.pdf
    • http://files.dsmpod.com/uploads/1/3/1/4/131483305/afa4f1ba0776e32.pdf
    • http://files.washingtonpedic.com/uploads/1/3/1/4/131438759/981da7fdb9d6ac8.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1157/files/grados_de_anemia_segun_la_oms.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zukax.pdf
    • https://cdn.shopify.com/s/files/1/0438/7163/3563/files/whirlpool_top_load_washer_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/72575100123.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/jasininajedupugiper.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7965/files/38107714274.pdf
    • https://cdn.shopify.com/s/files/1/0433/4216/8218/files/best_interview_question_and_answer.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/wavelet_transform_time_series_forecasting.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/sifisupolezagamupokosot.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/17747470297.pdf
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/breath_of_fire_2_snes_rom.pdf
    • https://cdn.shopify.com/s/files/1/0432/5225/2829/files/97661327021.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_off00006647.bin
c6eef5115d11604d8e3c2f87417aa14461abea33152a2c02fa7047b1846f4f9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6647 5716 bytes
font_01_sfnt_off000079a3.bin
56dce542490be6809e56e5df77acbcbbfc93cadd9ff895ea49e57103f00bfc0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x79A3 10236 bytes