Malicious PDF — malware analysis report

Static analysis result for SHA-256 62cd4015293e8e9c…

MALICIOUS

PDF

51.4 KB Created: 2020-08-01 07:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e925cbcb1bb92451fbed7a96177055bf SHA-1: 743a30466f02d610c5d3c36a5e87188a192c0ae2 SHA-256: 62cd4015293e8e9c3658994cb70138392cac24b719634ebbd4fbc749840686af
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service and a link farm. The primary malicious link identified is 'https://ttraff.cc/pify?keyword=how+do+you+copy+on+macbook+air', which is flagged as a malicious redirector. The document's structure and the sheer volume of links suggest an attempt to drive traffic to potentially harmful sites, likely for phishing or malware distribution.

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=how+do+you+copy+on+macbook+air
    • http://files.writefreepress.com/uploads/1/3/0/7/130775561/2878322.pdf
    • http://files.elspan.com/uploads/1/3/0/8/130874350/cbc6ee.pdf
    • http://files.superdeluxemarketing.com/uploads/1/3/0/8/130874250/7317951.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tagesagebog.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/gajipidi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1664/0923/files/zuxapasisixigulub.pdf
    • https://cdn.shopify.com/s/files/1/0432/8338/2427/files/45389412426.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2680/files/69377351925.pdf
    • https://cdn.shopify.com/s/files/1/0432/2381/0203/files/11293957281.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8971/files/bezeli.pdf
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/savuvomutatu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5274/files/71664686684.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/felamisakawubibaxejurelok.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/88199640967.pdf
    • https://cdn.shopify.com/s/files/1/0430/9667/0365/files/rakanuputupid.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006774.bin
0e3a711d9bdb5dda7017a7fd52245e558a0bbff1c3983bcd896b8159994fd5fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6774 5052 bytes
font_01_sfnt_off00007881.bin
8c7a83e53a2527ffa11bcf5aef17b5c13d05b76f8a52e911682422d8d9ebe913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7881 10328 bytes
font_02_sfnt_off00009c08.bin
2cadb2ae25cea88cb182acc54f62d1c218aef5f2772c4081b94d5d3cddde1204		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C08 16388 bytes
font_03_sfnt_off0000b195.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB195 4324 bytes

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