Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d358931e0f5f28…

MALICIOUS

PDF

66.5 KB Created: 2020-08-14 02:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c559f398772dd7c88b58b989f1a62c9b SHA-1: fb51ee3a34f573ad5677e9d0eb1326aaba1305a9 SHA-256: 95d358931e0f5f28e733e25613ecc4ddd48cfc4b1d9b7bc2fb846359cf51250f
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=block+strike++iphone'. Additionally, another critical heuristic indicates a PDF link farm, suggesting a broad distribution effort. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector URL is a high-priority indicator of a phishing or scam attempt.

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=block+strike++iphone
    • http://files.cdhjc.org/uploads/1/3/1/4/131406935/zewuzevovewixu-dumugijazozug-jusagamefizevot.pdf
    • http://vafanisiz.paintingsadrianbradbury.com.au/uploads/1/3/2/3/132303195/2584605.pdf
    • http://files.villagoband.com/uploads/1/3/0/9/130969489/8353608.pdf
    • https://cdn.shopify.com/s/files/1/0437/4836/0343/files/definition_of_market_research.pdf
    • https://cdn.shopify.com/s/files/1/0436/7505/8329/files/24065917885.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/77908170281.pdf
    • https://cdn.shopify.com/s/files/1/0433/0435/3950/files/nawolore.pdf
    • https://cdn.shopify.com/s/files/1/0432/1715/8312/files/bezesa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9862/7495/files/60369628126.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1185/files/english_grammar_in_marathi_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vibuzos.pdf
    • https://cdn.shopify.com/s/files/1/0429/0985/9999/files/61068189084.pdf
    • https://cdn.shopify.com/s/files/1/0432/5978/9472/files/dowupo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/24575541685.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/65036296931.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/
    • https://cdn.shopify.com/s/files/1/0432/1715/8312/files/bezesa.pd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7ba.bin
709c8be787a90fc4f08e6ead45465e55ddb877f2de179bfbd21eeeb19ddd6164
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BA 4924 bytes
font_01_sfnt_off0000d871.bin
fb1021718a69261b04dd62914cf13c65713140f208901b9c6f98aa40006bdd5b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD871 11220 bytes