Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1826bdcd269fc8c…

MALICIOUS

PDF

38.2 KB Created: 2020-08-03 04:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 107bcc3ccd191995da7816a11d403cbc SHA-1: 684a791e212097d060947348fd5a82d9d5b7ac7b SHA-256: d1826bdcd269fc8c80f458f5df27394c451300949a5a6f7918125fb77490de41
152 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The document body contains garbled text and a reference to 'lowes morristown tn', suggesting a potential lure, and the primary malicious URL is https://ttraff.ru/pify?keyword=lowes+morristown+tn.

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.ru/pify?keyword=lowes+morristown+tn
    • http://files.carusimsband.com/uploads/1/3/2/7/132712214/5f0d5cb8e2cb19.pdf
    • http://files.confidencewithetiquette.com/uploads/1/3/0/7/130738870/fexevetalume.pdf
    • http://files.bgfireprotection.com/uploads/1/3/1/4/131437627/jajitofitorop.pdf
    • https://cdn.shopify.com/s/files/1/0432/4353/6541/files/matricom_g-_pad_ex.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/49582452612.pdf
    • https://cdn.shopify.com/s/files/1/0431/1308/7142/files/rawekunolomemiwes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85484739365.pdf
    • https://cdn.shopify.com/s/files/1/0428/9966/9151/files/gimegowazemefarobe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/babysitting_cream_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0432/0552/5661/files/68895716119.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/zuzetenusesusoju.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/18867352108.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.pdf
    • https://cdn.shopify.com/s/files/1/0434/1304/5398/files/rockface_tv_series.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7545/files/78487778815.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_off00005b77.bin
c39f0c1bdaaf2da38e6a2ef4f346865060d20f91ba6eb56d2584f3492b9c78a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B77 4624 bytes
font_01_sfnt_off00006b2d.bin
5b16018e714c7fa467661bee3612108ec53a83fab941c84c416fc1180caacc15
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2D 9696 bytes