Malicious PDF — malware analysis report

Static analysis result for SHA-256 8079bcd0353580e7…

MALICIOUS

PDF

34.7 KB Created: 2020-08-18 22:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc43c479ce5160f5a9d66802ff589e75 SHA-1: a7901b900fa1a294bbec8f92b94a2399ccbd44c9 SHA-256: 8079bcd0353580e7bf98777915c8a716359aef26c217e00ca98c994bcd5eabde
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=cephalotripsy+full+album', which likely serves as a lure to a malicious site. The presence of a large number of external PDF links, many pointing to unknown domains, further supports a link farm or redirection strategy. No scripts were extracted, but the PDF structure and embedded links indicate a delivery mechanism for malicious content.

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=cephalotripsy+full+album
    • http://ruwadi.yranchcattle.com/uploads/1/3/1/8/131856698/lizatuz_bavizelifo_makokox.pdf
    • http://files.movmentlab.com/uploads/1/3/1/4/131453522/4326307.pdf
    • http://files.jazzetc.org/uploads/1/3/1/6/131637211/zegabog-deridinuzonag-rebiwudebuf.pdf
    • http://jexot.display101.com/uploads/1/3/1/3/131380005/sozimikotufemem_suxabizolepid_funolaseviv_nujuk.pdf
    • http://jagajosif.heatherrusk.com/uploads/1/3/0/7/130776811/wozoxinax-movanugisus-nigagozorumov-bolijob.pdf
    • https://cdn.shopify.com/s/files/1/0429/5688/2086/files/assertive_communication_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/13395943175.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/87643244018.pdf
    • https://cdn.shopify.com/s/files/1/0437/3289/3857/files/bl2_thunderball_fists.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/50429171536.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofusibosaduxigagixuvoma.pdf
    • https://cdn.shopify.com/s/files/1/0435/6997/1363/files/kezulaxodogajupavorij.pdf
    • https://cdn.shopify.com/s/files/1/0447/8310/8253/files/377621938.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9172/files/wisuxavekativeselun.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/58226671763.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.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_off00004ae2.bin
64b07d4c0fb7f67a7a2218142a2c247237b656177576613b60a54826f0a21d69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE2 5288 bytes
font_01_sfnt_off00005cba.bin
c25c6d057a21b5dcbc64a20ea1895a2884e5b6ec2331a40d3e4375f9044e8a64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBA 9724 bytes

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