Malicious PDF — malware analysis report

Static analysis result for SHA-256 866e63fee6fa7dc5…

MALICIOUS

PDF

46.3 KB Created: 2020-08-31 01:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08371dccb9ec503f0145a29171867dc9 SHA-1: 77ca38a4f506726623425216ffbac26661ac3a16 SHA-256: 866e63fee6fa7dc5b47548658dff229f3200d6780b7ce1ff194aa7f9b044a2ac
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=best+srs+surgeons+in+the+world'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of numerous other embedded URLs, many pointing to Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. No scripts were extracted, but the PDF structure and embedded URLs are sufficient to infer a malicious redirection attack.

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/wix?keyword=best+srs+surgeons+in+the+world
    • https://static.usrfiles.com/ugd/ddb60a_e84bfa639f3147c590ea99dbb2c35040.pdf
    • https://static.usrfiles.com/ugd/8c2aca_3fbf72ff1ca845909732aa5c78c6d1d3.pdf
    • https://static.usrfiles.com/ugd/136d07_83a9e95c841c484fbfbf95d17a07a351.pdf
    • https://static.usrfiles.com/ugd/2274a7_b2087a5b87e64aa5a2b33b3a20e2533f.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f270386712642d7ab246af03b1606e4.pdf
    • https://cdn.shopify.com/s/files/1/0462/1287/4394/files/dragon_ball_z_saga_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/sawonadovopozuwem.pdf
    • https://cdn.shopify.com/s/files/1/0428/2246/7750/files/passive_and_active_causative_exercis.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/esl_adverbs_of_frequency_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2808/files/i_hate_target.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/woxig.pdf
    • https://cdn.shopify.com/s/files/1/0428/7994/2812/files/uf_apk_syllabi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3195/2536/files/58738572430.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_off00006ac0.bin
a891f92638811ed73155cf8ae6474b98ad0d944a5828c6fef9420d8a835fc48f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC0 4900 bytes
font_01_sfnt_off00007b6c.bin
7d339367275a97bf79a6de7d042094f1a4c5ce4a0995c6c7fb80e2952f583b0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6C 10192 bytes
font_02_sfnt_off00009e60.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E60 4324 bytes