PDF malware analysis — malicious · 157a3d85cbe0d7e1

MALICIOUS

PDF

35.5 KB Created: 2020-08-26 07:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e300954ce0f79ed7550043eeadfac220 SHA-1: bb5858ea9de246252f701bec9a7a3ff4f73de0e3 SHA-256: 157a3d85cbe0d7e173f6b6372dc7079029b336e72948b3eec0c2a8bcd9a55837

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which are disguised as book titles and point to a redirector service. The primary malicious link, 'https://ttraff.com/pify?keyword=complex+analysis+zill+3rd+edition', is identified as a malicious redirector. This suggests the document is designed to lure users into clicking these links, likely leading to further malicious content or exploitation.

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=complex+analysis+zill+3rd+edition
- http://kanofuf.uniontownartclub.org/uploads/1/3/0/7/130739974/c38b0dcec15636.pdf
- http://files.omraneguedhami.com/uploads/1/3/1/4/131453256/ef738c.pdf
- http://jitaju.lottiecreates.co.uk/uploads/1/3/0/7/130738970/xilirin.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0447/9575/6693/files/secrets_of_the_psalms.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34007074416.pdf
- https://cdn.shopify.com/s/files/1/0437/1536/2984/files/true_magazines.pdf
- https://cdn.shopify.com/s/files/1/0427/5650/5756/files/remorinafarefepezud.pdf
- https://cdn.shopify.com/s/files/1/0432/9065/6936/files/vopidovefir.pdf
- https://cdn.shopify.com/s/files/1/0434/1868/1496/files/brain_teasers_quiz.pdf
- https://cdn.shopify.com/s/files/1/0433/5632/3995/files/luvepuwi.pdf
- https://cdn.shopify.com/s/files/1/0452/6234/0258/files/alfabeto_en_ingles_y_espaol.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004c71.bin` `c1fb5354c886d526d09782735e9c8b4639955809517b49cbcaf0629093b95fd2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4C71	5396 bytes
`font_01_sfnt_off00005eba.bin` `901641939f6d06fe36f305db54d1675c069d31777ddeca6d65bce792347a26cd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EBA	10384 bytes

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