Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a141a0c2fbd18b…

MALICIOUS

PDF

44.4 KB Created: 2020-07-31 07:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5c2fe47f6add35d953f8fd711411f8f SHA-1: 578265147f3728b8650486f7fb9d0784ec623997 SHA-256: b6a141a0c2fbd18ba540187e155a6d4a92b8ca133e5af6873e3d706abb766691
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. This indicates an attempt to lead the user to a malicious site. The document body, though heavily obfuscated, contains text related to 'Dawn english newspaper download pdf', suggesting a lure. The presence of numerous external links, many hosted on Shopify, further supports the SEO link farm heuristic, indicating a campaign to generate traffic to malicious sites.

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=dawn+english+newspaper+download+pdf
    • http://files.lindaepix.com/uploads/1/3/1/8/131856883/kazazina.pdf
    • http://files.meetmyshoes.org/uploads/1/3/2/3/132303035/pixupekopimebed.pdf
    • http://files.wendyrhodesphotography.com/uploads/1/3/1/3/131383727/wezetare_rapavivu_pasuwaroxapex.pdf
    • https://cdn.shopify.com/s/files/1/0434/0927/7095/files/11226221595.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69262577592.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3586/files/dolevebavuwefuvuvigili.pdf
    • https://cdn.shopify.com/s/files/1/0437/7912/9501/files/91150769599.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/61915092685.pdf
    • https://cdn.shopify.com/s/files/1/0436/8610/1145/files/maxozazidoxabuzomu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5876/files/85682937347.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/kidosebonanemefevez.pdf
    • https://cdn.shopify.com/s/files/1/0435/6512/1695/files/88760995229.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9941/files/dofabunimowofojozagogufeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/64868902343.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0610/files/tadeb.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/
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/619

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c60.bin
7b26e0b335b3aa632b2d9ac0bf61a9e3f248f869751a77e1d6b87cd11c1099bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C60 5100 bytes
font_01_sfnt_off00007dbb.bin
adbccd31acdf9c59fcf35263fb5a189bc5d12f9c9cc7a5fbe03ece4007f4abc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBB 11964 bytes