Malicious PDF — malware analysis report

Static analysis result for SHA-256 c848677df3e0a046…

MALICIOUS

PDF

69.0 KB Created: 2020-07-31 18:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0781deb383ef27af54dec1266d258d3c SHA-1: bec785d26ceba301c800b5b77dda82551c2eaaa7 SHA-256: c848677df3e0a0466069fabe9957e6c932ee80ed0a5fe09c17fd386be9caf9ae
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 'ttraff.ru'. Additionally, it features a PDF link farm heuristic, indicating a large number of outbound links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary purpose is to lure users to malicious infrastructure.

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=dont+trust+the+bitch+in+apartment+23
    • http://files.stuntlady.com/uploads/1/3/2/8/132814589/vitosuwi_fusivuz_mokabo_jubaze.pdf
    • http://files.dpdesq.com/uploads/1/3/2/6/132695568/jasaxolorudeloji.pdf
    • http://files.studyenglish121.com/uploads/1/3/1/3/131379692/82db5570b1a550.pdf
    • http://files.avid-advocatesforvictimsofimpaireddriving.org/uploads/1/3/1/4/131454012/jixipu.pdf
    • http://files.enchantedcakesandtreats.com/uploads/1/3/1/4/131453543/9371136.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/55106133089.pdf
    • https://cdn.shopify.com/s/files/1/0434/8621/6352/files/rapeguf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1185/files/marinetifiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/notejepuj.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/gaveradoremobu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1874/7036/files/tivepaduwitesunifinijexu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0728/files/gofibumezimogu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8347/1771/files/51216389624.pdf
    • https://cdn.shopify.com/s/files/1/0430/9791/5545/files/79026846666.pdf
    • https://cdn.shopify.com/s/files/1/0428/1348/9319/files/98322530235.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/94606616736.pdf
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/faxusigup.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/fufopipiwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9304/8992/files/39117708320.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92904811518.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_off0000c246.bin
df97fedc93a48e77904c9ac71b6cf613bf7f54bc1b3b07e687ac9353a6d0d652		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC246 5456 bytes
font_01_sfnt_off0000d4a7.bin
e80069e1c892f32fa251cbca04647e8282a7cbb73df86e92d266b811e6c72d0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A7 10388 bytes
font_02_sfnt_off0000f827.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF827 4324 bytes

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