Malicious PDF — malware analysis report

Static analysis result for SHA-256 18bcacc1c189d840…

MALICIOUS

PDF

33.6 KB Created: 2020-08-18 22:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2635cac5f44dd286ca13ebebbed7ccae SHA-1: cd394ae7915fb2e744b8c66a27bf3b762069a463 SHA-256: 18bcacc1c189d84065e07c27566cd7a9ef54be1d29627af6bad68132bc4aeb0b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying it as a PDF SEO link farm. One of the primary links, https://ttraff.cc/pify?keyword=owners+manual+ford+fusion, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to 'owners manual ford fusion' and the wkhtmltopdf application, suggesting a lure to disguise malicious content. The presence of embedded URLs and the link farm structure indicate an attempt to drive traffic to potentially 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.cc/pify?keyword=owners+manual+ford+fusion
    • http://files.spotonslgroup.com/uploads/1/3/1/4/131454090/488226dfb.pdf
    • http://kugazakap.themaryroland.com/uploads/1/3/0/8/130814297/5016516.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/1685/1356/files/believer_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/25139844243.pdf
    • https://cdn.shopify.com/s/files/1/0440/4445/2005/files/barreras_fisiologicas_de_la_comunicacion.pdf
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/7685476533.pdf
    • https://cdn.shopify.com/s/files/1/0435/9369/5391/files/basic_life_support_in_obstetrics_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/xifutilitiwuxukezira.pdf
    • https://cdn.shopify.com/s/files/1/0431/9464/6689/files/41119799500.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/fesarevozodafomikelojo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/makkar_ielts_speaking_download_2020_may_to_august.pdf
    • https://cdn.shopify.com/s/files/1/0429/0704/1958/files/kuziladezajijejo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004743.bin
1ae4690256e656afad5333d0ec37a48aef12d528b8cf97408fdcccb4dde09d61
pdf-font-stream PDF embedded font (sfnt) at offset 0x4743 5172 bytes
font_01_sfnt_off000058c8.bin
ec12b1a33da8a0667296519baaa0a4e5d8a90fc76a29e55e30abf4087438dbf8
pdf-font-stream PDF embedded font (sfnt) at offset 0x58C8 9812 bytes