Malicious PDF — malware analysis report

Static analysis result for SHA-256 428e2d160b65cbf4…

MALICIOUS

PDF

45.5 KB Created: 2020-08-22 09:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3126b1c15de8d51850c9ee6e4995f05f SHA-1: 54ca9ec8dad29c256d98099471f9157c16d2bd01 SHA-256: 428e2d160b65cbf453a4df3d511a669a54daee999c5773c8ef8659b3d60854dc
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded links, particularly the one to 'ttraff.cc', suggest a redirection to a malicious site. The document body, though heavily corrupted, contains fragments of URLs and text that align with the heuristic findings of a link farm.

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=emiway+bantai+machayenge+video+song
    • http://files.fenianfear.com/uploads/1/3/0/9/130969357/telurus.pdf
    • http://pawukawiz.hillszonechssa.asn.au/uploads/1/3/1/8/131856462/piwisifi.pdf
    • http://files.athenasbyjoellen.com/uploads/1/3/0/7/130776878/68a48126e9.pdf
    • http://files.okanaganwine.ca/uploads/1/3/1/4/131408068/95727c46a3ea70c.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/doverumikojavibut.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/75556187790.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2867/files/93431837377.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/gewifitezok.pdf
    • https://cdn.shopify.com/s/files/1/0429/1136/7331/files/sticky_bomb_risk_of_rain_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/47494482491.pdf
    • https://cdn.shopify.com/s/files/1/0455/3310/2245/files/senorita_camila_cabello_song.pdf
    • https://cdn.shopify.com/s/files/1/0437/7224/8215/files/bixidutoxujix.pdf
    • https://cdn.shopify.com/s/files/1/0434/1707/5868/files/nikon_d3100_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7713/1683/files/operation_barbarossa_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6901/files/xudigizulepokor.pdf
    • https://cdn.shopify.com/s/files/1/0437/0412/3557/files/10907188524.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/92927765555.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9544/files/79441982523.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_off00006c1b.bin
b44cbde68992d074fa55afe3b1306ed594fac058324b3f20ebf4e57efc06d2ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1B 5576 bytes
font_01_sfnt_off00007efc.bin
027b3aeba95e21b93e37adeede0f4a6a0b979606f2d012dd1ece842056940133		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFC 13196 bytes

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