Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1dfc899933c1cd…

MALICIOUS

PDF

48.9 KB Created: 2020-08-22 15:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d175a00674b343086ea1fd48731b6197 SHA-1: cdf4d4f15d1423211c43a7e49c5873d3b9020697 SHA-256: ad1dfc899933c1cd55910ee3f12c42696a477c86e8f87489753fcab08a2649cc
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The document body contains obfuscated text and embedded URLs, including a suspicious URL pointing to 'ttraff.cc', which is known for redirecting to malicious content. The presence of numerous external links suggests an attempt to lure users to potentially harmful 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.cc/pify?keyword=nota+novel+bimasakti+menari+pdf
    • http://talax.rescuetheunderdog.com/uploads/1/3/1/3/131384429/digiwanibatexos.pdf
    • http://files.wikiscreenplaycontest.com/uploads/1/3/2/6/132683088/ninikoravulemiraj.pdf
    • http://sibevim.21daykindnesschallenge.org/uploads/1/3/2/8/132814930/6327094.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6239/files/calculus_without_derivatives.pdf
    • https://cdn.shopify.com/s/files/1/0430/3775/3501/files/90684765920.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/my_sister_s_keeper_cast.pdf
    • https://cdn.shopify.com/s/files/1/0434/7081/5397/files/ensayo_de_bienestar_animal.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/cyanohydrin_formation_is_reversible_in_base.pdf
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/98436202507.pdf
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/93041336846.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_off000075ba.bin
c05cf363439051a8090e536fdfc7fe0ebb7d2e82f8b0524f400d921f3aa3762a
pdf-font-stream PDF embedded font (sfnt) at offset 0x75BA 5208 bytes
font_01_sfnt_off00008755.bin
9c1684210fc310ae633913de102cef837e6a689870925a9d62090088786927ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x8755 9660 bytes
font_02_sfnt_off0000a83a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA83A 4324 bytes