Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff1a632d01f385ef…

MALICIOUS

PDF

68.3 KB Created: 2020-07-31 08:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f111eb96ad59e31157914d0491683f8d SHA-1: 2bbfe5d7bb69c76e1ff2eff669a9ac81ed4e8b7d SHA-256: ff1a632d01f385ef3819fcc8d302199ef0530a6b3a6f6d228288891adb264988
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

This PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One prominent link points to a known malicious redirector, ttraff.ru, which is likely used to obscure the ultimate destination of the attack. The document body, though heavily obfuscated, suggests a lure related to 'Angular 4 tutorial pdf free download', aiming to trick users into clicking the malicious links.

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=angular+4+tutorial+pdf+free+download
    • http://files.campmi.org/uploads/1/3/1/3/131381241/7276887.pdf
    • http://files.mid51.com/uploads/1/3/1/3/131380063/nevagevop.pdf
    • http://files.micaproductsandwood.com/uploads/1/3/1/3/131380258/d5eda03c9d6d.pdf
    • http://files.frecklefacemakeup.com/uploads/1/3/0/7/130775888/9460784.pdf
    • http://files.prairiefootprints.com/uploads/1/3/0/8/130874276/51916.pdf
    • https://cdn.shopify.com/s/files/1/0438/8978/7048/files/delojediborugimuzirowis.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8180/files/14218488145.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/pilovoboluribarowixazozu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ginowojero.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/kuxiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/tizasepesikuse.pdf
    • https://cdn.shopify.com/s/files/1/0437/1303/6439/files/rosef.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/zotavunitul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/bowufa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/29878194145.pdf
    • https://cdn.shopify.com/s/files/1/0430/7533/8389/files/nidudod.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/tukexuzidamopewedaranoxar.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/37135831303.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_off0000c731.bin
80949f455b28ee50f30c7afcab4c04c926e3038869fa29fd02352fdc813a21e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC731 5084 bytes
font_01_sfnt_off0000d89f.bin
f5a532312bc1bf238a8c3c97725cd4a1b0ddf2c8b11b8524715b382553194a79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD89F 13352 bytes

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