Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a2708411b0c189…

MALICIOUS

PDF

43.9 KB Created: 2020-08-12 04:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3510908f5630040dca553f94b9404ecd SHA-1: bec2363426967d2f2e66441f5a3ddd2375e09c5a SHA-256: d2a2708411b0c1898a594c4866bef2475c980d8680bff5c5435e86c5631aa91f
152 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This indicates a link farm strategy designed to obscure the ultimate destination and potentially distribute malware or lead to phishing pages. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=absolute+friends+pdf
    • http://files.gemflo.com/uploads/1/3/2/6/132695467/2542373.pdf
    • http://nemufu.kksquiltstudio.com/uploads/1/3/1/8/131855997/tawuxagabam-kenopukam-sivopasa-tigasevivi.pdf
    • http://files.maryhigginswebdesign.com/uploads/1/3/0/7/130775921/fec3396eeff417d.pdf
    • https://cdn.shopify.com/s/files/1/0431/6119/0554/files/37970015538.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/atmospheric_science_an_introductory_survey_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/6816/1184/files/wonasabiferuborodoxixev.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/mabinumuwerarofelumunof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rapuz.pdf
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/pamapima.pdf
    • https://cdn.shopify.com/s/files/1/0433/7562/4350/files/4061585012.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3561/files/11290512408.pdf
    • https://cdn.shopify.com/s/files/1/0435/8661/7501/files/xibenozozumemizi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1568/2717/files/arduino_string_split.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_off000061a2.bin
7244216e45defc6be92edcc5b50812d211f76ff53b94cc511e1965bd5d100c51
pdf-font-stream PDF embedded font (sfnt) at offset 0x61A2 4836 bytes
font_01_sfnt_off00007210.bin
a8fe5602aca5964360b3eadc93aab95c8e9b9de12b14fa63ae568aa6c0ec4a4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7210 10204 bytes
font_02_sfnt_off000094f8.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x94F8 4324 bytes