Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca47f59d9f4077a…

MALICIOUS

PDF

46.8 KB Created: 2020-08-21 16:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbca9a84b9765d5f5b64c35c7cb0ec92 SHA-1: c0d155a874f5037d0a2b3c8825f36dca7bf17271 SHA-256: fca47f59d9f4077af4ab981a7481ab824b008a4cfeef25a89156731b35fe243a
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL identified is https://ttraff.ru/pify?keyword=airtel+data+plan+for+android+codes, which is likely used to funnel users to further malicious content.

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=airtel+data+plan+for+android+codes
    • http://files.chillingthemost.com/uploads/1/3/1/4/131453539/8a7886255e.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/59935206712.pdf
    • https://cdn.shopify.com/s/files/1/0428/5703/7990/files/51834913917.pdf
    • https://cdn.shopify.com/s/files/1/0440/4684/4054/files/mamujusebekeridoxera.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/rirudabifimepikis.pdf
    • https://cdn.shopify.com/s/files/1/0434/3414/7989/files/former_buckeyes_in_nfl.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/gixit.pdf
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/iphone_6_without_contract_prices.pdf
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/92095674398.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/zeruxezunogubixago.pdf
    • https://cdn.shopify.com/s/files/1/0435/3218/9860/files/modified_bessel_function.pdf
    • https://cdn.shopify.com/s/files/1/0430/8641/3985/files/43596026978.pdf
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/placental_development_stages.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_off00006c7e.bin
8e9913feadde8607a182b488be9cab3c17b5b4bd6ff569bdb9611783be624522
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7E 4928 bytes
font_01_sfnt_off00007d43.bin
1c1564ed877eba4e311ae9a6f88049617e559e08463a874ff8c718c4a577944f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D43 10288 bytes
font_02_sfnt_off0000a06a.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xA06A 4324 bytes