Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ddc43a821c4c602…

MALICIOUS

PDF

40.7 KB Created: 2020-08-21 07:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fae6fce09b700049fcd125438753709f SHA-1: e7a2aee1bb7e8b453a928a9ff741a4cded352e96 SHA-256: 1ddc43a821c4c6024a47f2caf79a439bc0b53328ed2124fb600deb77d89cc94d
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 of which point to external resources, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=information+about+bugatti+la+voiture+noire'. The document body, though partially corrupted, also contains this URL, suggesting an attempt to lure users through a seemingly informative topic.

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=information+about+bugatti+la+voiture+noire
    • http://files.smilecommunicationsgroup.com/uploads/1/3/2/6/132681002/vebevemiru.pdf
    • http://rimodelag.pachamamamarket.org/uploads/1/3/1/4/131437252/c470f11034a3.pdf
    • http://files.tomsolaribuilder.com/uploads/1/3/0/7/130739895/kutovomefarug.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/govudidijuwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/98914339694.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/xedojoja.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/robipegegujozibutawor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51982080438.pdf
    • https://cdn.shopify.com/s/files/1/0460/1371/0503/files/android_1_traffic_rider.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/26267862120.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8143/files/sri_kalabhairava_ashtakam_lyrics_in_tamil_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0435/7586/9603/files/beloved_part_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/4675/6774/files/tujezasawarodarulezi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0406/6983/files/sikopawozu.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_off00006220.bin
88ff9fa08262212b29f45c7077781ff81b5cac669ed763ccd628194fc50a29ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x6220 5048 bytes
font_01_sfnt_off00007339.bin
69f872cd0217ac89378b32fcc34e857423102cffedb30a0e08e08e001e0c4af4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7339 10072 bytes