Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2bd9d8c64fff0b…

MALICIOUS

PDF

49.6 KB Created: 2020-07-19 19:39:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8fc5eceb29f30c5173b72303c3490de SHA-1: a602b7c8fbd1635654f0939726b71c2380f5c9c9 SHA-256: 2e2bd9d8c64fff0b2cff280c6dceaf4ea02d57d06b30c770695faf5e6c03488c
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests a large number of external links are present, likely for SEO manipulation or to host further malicious content. The document body, though obfuscated, contains text related to 'Dwyer mark ii manometer instructions', which appears to be a lure. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=dwyer+mark+ii+manometer+instructions
    • http://files.knittygrittysyr.com/uploads/1/3/0/7/130775653/namififozemux-lisabipalemise.pdf
    • http://files.tbreeden.com/uploads/1/3/1/3/131382590/taxosiramo.pdf
    • http://files.choonricollection.com/uploads/1/3/0/7/130775537/8473027.pdf
    • http://files.realifewsp.net/uploads/1/3/1/4/131438582/7417058.pdf
    • http://files.stjepanpepiskuric.com/uploads/1/3/0/9/130969075/3af1e5029b9bcc.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8768/files/pibozitiwuxorixu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/47737876880.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1236/files/99723384794.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/87219022873.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/90771483297.pdf
    • https://wifobawixobi.files.wordpress.com/2020/06/tatarugipigabive.pdf
    • https://jifolidudoj.files.wordpress.com/2020/07/15978124603.pdf
    • https://wafinafu542781998.files.wordpress.com/2020/06/pizukujawudasapanopox.pdf
    • https://cdn.shopify.com/s/files/1/0434/0757/3157/files/82503906067.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7745/files/nesivakusamilipodob.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/88632741225.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/xirofopadajabegovazab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/63534708731.pdf
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/sobipojoko.pdf
    • https://cdn.shopify.com/s/files/1/0428/8702/0703/files/38936949706.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/
    • https://cdn.shopify.com/s/files/1/0431/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c23.bin
3b2d96d1df22f03336b1b59f442853c20ec2fe1b83f04330ee64c7d33c1cd6f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C23 5052 bytes
font_01_sfnt_off00008d54.bin
483922f2c868a16afea9d01abd6f18d2037466eace5d3506ccc73a82b3ada9cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D54 13076 bytes

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