Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ce500188bf84f2…

MALICIOUS

PDF

41.6 KB Created: 2020-08-09 23:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f12a3aaf9bc03e09c11bf4c4c1ff0b69 SHA-1: 6e0e44b1c763e60178e6236735e99e514b981aff SHA-256: 29ce500188bf84f21b4527185a22ee0446843ef80b12674f0209f896dfa47bf2
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=increment+and+decrement+operators+in+java+with+examples+pdf'. The document body, though heavily obfuscated, contains references to the same URL, suggesting a deliberate attempt to redirect users to malicious infrastructure. The presence of numerous links, including the identified malicious one, indicates a link farm or phishing 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=increment+and+decrement+operators+in+java+with+examples+pdf
    • http://files.lamaisonneuve.com/uploads/1/3/0/8/130814208/89e0cb44.pdf
    • http://files.rscds-stirling.org/uploads/1/3/0/8/130814351/jomutevogezise.pdf
    • http://files.equestrianeliteatapplejackfarm.com/uploads/1/3/1/4/131453725/dcaa468ae5982f.pdf
    • http://files.adameccleston.net/uploads/1/3/0/8/130874102/2862208.pdf
    • http://files.besttestboosters.com/uploads/1/3/1/6/131606289/lilaxi_misoj_womodamuraw_nabix.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/exercice_barycentre_logistique_corrig.pdf
    • https://cdn.shopify.com/s/files/1/0437/6818/4993/files/grade_12_maths_probability_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/the_iliad_penguin.pdf
    • https://cdn.shopify.com/s/files/1/0437/7916/2263/files/sherlock_holmes_truyn.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/73946430795.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2255/files/abdominal_distension_differential_diagnosis.pdf
    • https://cdn.shopify.com/s/files/1/0437/9967/5040/files/31794054765.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5958/files/an_example_synonym.pdf
    • https://cdn.shopify.com/s/files/1/0434/2516/9565/files/tidaxorujojumiravoke.pdf
    • https://cdn.shopify.com/s/files/1/0430/0052/9049/files/suvinobukokezurozu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/dixuvigefuwamutikewod.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_off00005f6a.bin
e895b8b74b9281344476b9b550c2549ca21833f03c4d0b4445e343db36fab395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6A 5628 bytes
font_01_sfnt_off0000727e.bin
b3b1e905e4be8fdec1bf9ae67bafa5c65cd678110b92a827220e3c273eecc449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727E 11992 bytes

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