Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d86a2105853ffe…

MALICIOUS

PDF

44.9 KB Created: 2020-08-24 02:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a61455c0c8feedae06b055d25425ba1 SHA-1: e45fb35bcd1487597607fbb6132c95a72bc4ecb1 SHA-256: a0d86a2105853ffe64db1900904c83cf6863fc5e5403e3fd73005de5a02b449c
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. This suggests a link farm or redirection tactic to obscure the final malicious destination. The document body itself contains text related to movie downloads, likely a lure to entice users to click the malicious link. No scripts were extracted from this sample.

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=100mb+bollywood+movies++mkv
    • http://files.westequip.com/uploads/1/3/0/8/130814055/lugesowobeliko-pirawasup.pdf
    • http://files.mimimanners.net/uploads/1/3/2/6/132695707/0d98db.pdf
    • http://files.greenivygraphics.com/uploads/1/3/0/7/130739212/dazeberuwazale-gopaluwenoze-biparisamiv.pdf
    • http://tetaxazak.gosforddistrictmotorcycleclub.org/uploads/1/3/1/4/131454029/6532935.pdf
    • https://cdn.shopify.com/s/files/1/0440/5598/6341/files/zotojafomubi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7011/9318/files/small_alphabet_tracing_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/future_maker_products_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32505595602.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/14827801177.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/wisezexesamog.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3651/files/94087020555.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/sadenudoniwofafudoxokad.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/24572837814.pdf
    • https://cdn.shopify.com/s/files/1/0434/3100/2264/files/car_sale_agreement_sample.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_off00006288.bin
4bc37359d3d4f39795905510919cb4f63eb77277bd83585fc3990e6972e42105
pdf-font-stream PDF embedded font (sfnt) at offset 0x6288 5224 bytes
font_01_sfnt_off0000745c.bin
e2409881eace951fa6ec27b12995880285207533685b994eeba120003622d87f
pdf-font-stream PDF embedded font (sfnt) at offset 0x745C 15692 bytes