Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1cf1c63c06adc8…

MALICIOUS

PDF

46.4 KB Created: 2020-08-31 13:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10bd4be2762638cc1be42d1f3533851d SHA-1: d5ca802f02a12508dcdab72a39f567499dd5553e SHA-256: ad1cf1c63c06adc89598d160c609c00e6b33474a0e07e6d1e4e32cba2718ec77
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files, which is characteristic of a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious objective. The document body, though partially corrupted, contains text that appears to be a lure related to 'Aaronic priesthood lesson manual 2'. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=aaronic+priesthood+lesson+manual+2
    • https://static.usrfiles.com/ugd/b8c837_96909f32a42a41c2bac533be2f74c901.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b1e7c6323bf4b9a92f753438ff76aec.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b0858a8111249ca9bf11a06f1dafa58.pdf
    • https://static.usrfiles.com/ugd/b8c837_b02aa0ade46f4f23bf2127895aa77f3b.pdf
    • https://cdn.shopify.com/s/files/1/0432/4373/3154/files/get_mp3_from_video_with_ffmpeg.pdf
    • https://cdn.shopify.com/s/files/1/0427/4195/6775/files/acarologia_agricola.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16711599054.pdf
    • https://cdn.shopify.com/s/files/1/0461/9829/2638/files/77342303349.pdf
    • https://cdn.shopify.com/s/files/1/0429/5426/0633/files/apixaban_medication_guide.pdf
    • https://static.usrfiles.com/ugd/4479ed_b806b5e441d64a249d155e2f8633d3de.pdf
    • https://static.usrfiles.com/ugd/cc14e4_b9e2725341f449d1b63ec8bb93614f2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1b3d97bc48f497abe3862f8b9e863d5.pdf
    • https://static.usrfiles.com/ugd/96768c_aa26adf6075a4adcb0153b65783ede33.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_off000075d4.bin
26b4a01b3626ae810d6b051635b3530c3912caf2de47dd6a572b6ed0e1c7c116
pdf-font-stream PDF embedded font (sfnt) at offset 0x75D4 5436 bytes
font_01_sfnt_off00008821.bin
3d597069a5d25b10c00438e899e10616065075a1ed1689c1b29b7a1b84b98c50
pdf-font-stream PDF embedded font (sfnt) at offset 0x8821 10724 bytes