Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28e10a83c6ac285…

MALICIOUS

PDF

36.4 KB Created: 2020-08-31 06:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb3a73e04955ffb7c6a2fd725ee43ea1 SHA-1: 9c8aaee792a99f0812373cc7b9bf7850c2fe3637 SHA-256: d28e10a83c6ac2851f79b56d643ff49473ea27206392ad8411aea67d97328e29
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains text related to a 'whirlpool accubake oven owner's manual' and the malicious URL itself, suggesting a lure to trick users into clicking the link. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains, likely for SEO manipulation to increase visibility of the malicious redirector.

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.me/wix?keyword=whirlpool+accubake+oven+owner%2527s+manual
    • https://static.usrfiles.com/ugd/769f78_82fb3f2eb5c347cfbfb70e8db47a8113.pdf
    • https://static.usrfiles.com/ugd/a382ee_ad9d4a67a5b441cb92256cdc3a50ee45.pdf
    • https://static.usrfiles.com/ugd/409ca8_dca84587861a462caca75f2a84d22e89.pdf
    • https://static.usrfiles.com/ugd/3f4b99_5980c68fc78e48619bf592f07dbaa89c.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/lisabe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3673/7699/files/javascript_array_remove_element.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/91210290724.pdf
    • https://cdn.shopify.com/s/files/1/0432/9370/4356/files/17220141480.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/81091386162.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/pediatric_cardiovascular_examination.pdf
    • https://cdn.shopify.com/s/files/1/0434/8398/8125/files/scholastic_aptitude_test_philippines.pdf
    • https://static.usrfiles.com/ugd/22739b_ce1bbe804c8e4775b56b6e5522e7ea8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_5be36ac1631b4b15bfdcc26c2d20537c.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_off00004331.bin
f02f165b418da72b9779c168ce58860389f09bfb9a59533af1a0452f7bb35c5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4331 5376 bytes
font_01_sfnt_off00005553.bin
fa4d3a2c57db18abb979cfa99593f322e99a2da6ebdfe51a8a510219a2d284c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5553 9260 bytes
font_02_sfnt_off000074cf.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x74CF 4324 bytes