Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c723c43c833efb…

MALICIOUS

PDF

53.9 KB Created: 2020-08-01 14:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec77961c38c2ad9317624abd0684e072 SHA-1: e153a8c3fed0f6fbf37a1b38b06321d4163729f7 SHA-256: 27c723c43c833efbea5073a4ed47a70e1db4a533a24984fec3a8a897dde2cb2b
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting an SEO poisoning or phishing attempt. The primary malicious URL identified is https://ttraff.ru/pify?keyword=presto+griddle+pancake+temp. While no scripts were extracted, the sheer volume of embedded links and the nature of the redirector strongly indicate a malicious intent to lure users to potentially harmful sites.

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.ru/pify?keyword=presto+griddle+pancake+temp
    • http://files.susanhandelman.com/uploads/1/3/2/7/132740270/f508e65218c.pdf
    • http://files.coyotesbikeclub.com/uploads/1/3/0/8/130874055/defexanobuju.pdf
    • http://files.bonafidemealprep.com/uploads/1/3/2/6/132695602/xijor_muriwetot_sofimugagiwi_mewujizagofob.pdf
    • https://cdn.shopify.com/s/files/1/0438/8257/8088/files/27244493991.pdf
    • https://cdn.shopify.com/s/files/1/0430/4912/3993/files/lavize.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/5051470823.pdf
    • https://cdn.shopify.com/s/files/1/0434/1107/9317/files/witad.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/xigara.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/wogalobiwarowujusege.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/pujuma.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/westminster_shorter_catechism_with_scripture_proofs.pdf
    • https://cdn.shopify.com/s/files/1/0433/1575/7214/files/25005488442.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/56942914954.pdf
    • https://cdn.shopify.com/s/files/1/0429/7077/5706/files/75818566841.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_off000095c1.bin
5e105acb56d4476e17983f2e7fdb4e12b3808d25a6170240455c2a84b745751d
pdf-font-stream PDF embedded font (sfnt) at offset 0x95C1 5460 bytes
font_01_sfnt_off0000a83f.bin
78a12664e61cacdedf9f618a585913e91d8bd7e336414824ab939cbb5019a18e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA83F 10228 bytes