Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d70780d1b13959…

MALICIOUS

PDF

46.4 KB Created: 2020-08-02 10:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9ecf1d532b7086c819899cfdb40b3f4 SHA-1: 23770065c85b1b9118f630ad8a98acf3cdbaddbf SHA-256: 47d70780d1b139599ba4854f3acb9e29cb41a16e4bfd9f8f170bc4c061fa2e31
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a '2013 chevy cruze repair manual pdf' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=2013+chevy+cruze+repair+manual+pdf
    • http://files.dancingtheland.com/uploads/1/3/0/7/130774990/7397696.pdf
    • http://files.fawkhamridingclub.com/uploads/1/3/1/3/131378923/5015f3687.pdf
    • http://files.thesoapshepherd.com/uploads/1/3/2/6/132681757/a3c2c.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/82699224266.pdf
    • https://cdn.shopify.com/s/files/1/0430/6167/4133/files/50442958583.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/54135912819.pdf
    • https://cdn.shopify.com/s/files/1/0435/4356/0346/files/2986943921.pdf
    • https://cdn.shopify.com/s/files/1/0437/5491/3950/files/fakodulepetebepodirutes.pdf
    • https://cdn.shopify.com/s/files/1/0431/5463/6966/files/39657724589.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8188/files/53816195188.pdf
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/fezov.pdf
    • https://cdn.shopify.com/s/files/1/0437/8578/1405/files/33624824653.pdf
    • https://cdn.shopify.com/s/files/1/0436/8180/8549/files/61280555286.pdf
    • https://cdn.shopify.com/s/files/1/0432/3541/0077/files/bokesi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8608/5277/files/16414662810.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/71047520647.pdf
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/git_clone_specify_ssh_key.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_off00006720.bin
dc99a60d6f13bdfc97b124a46622c7a9de6bc915b3e69f4f80190908663de6b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6720 5516 bytes
font_01_sfnt_off000079bf.bin
e8f8aaeb838c13c68e1cb455ed52a0bc890cd72a09b1a080a4877784377512aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79BF 10892 bytes
font_02_sfnt_off00009e80.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E80 4324 bytes

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